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1021224321012 = 22371092113311597
BaseRepresentation
bin11101101110001011011…
…01100111111111110100
310121121221212201122102110
432313011231213333310
5113212431411233022
62101051033211020
7133531614334650
oct16670555477764
93547855648373
101021224321012
1136410a562465
12145b05b60a70
13753bb501a7c
14375db18da60
151b86ec2400c
hexedc5b67ff4

1021224321012 has 192 divisors, whose sum is σ = 2771350292480. Its totient is φ = 286682457600.

The previous prime is 1021224320891. The next prime is 1021224321049. The reversal of 1021224321012 is 2101234221201.

It is a happy number.

It is a super-2 number, since 2×10212243210122 (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1021224321012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 639463398 + ... + 639464994.

Almost surely, 21021224321012 is an apocalyptic number.

1021224321012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021224321012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385675146240).

1021224321012 is an abundant number, since it is smaller than the sum of its proper divisors (1750125971468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021224321012 is a wasteful number, since it uses less digits than its factorization.

1021224321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1021224321012 its reverse (2101234221201), we get a palindrome (3122458542213).

The spelling of 1021224321012 in words is "one trillion, twenty-one billion, two hundred twenty-four million, three hundred twenty-one thousand, twelve".