1021101211320 has 256 divisors, whose sum is σ = 3272340556800. Its totient is φ = 254336163840.

The previous prime is 1021101211301. The next prime is 1021101211321. The reversal of 1021101211320 is 231121011201.

It is a super-2 number, since 2×1021101211320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1021101211320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021101211321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23380224 + ... + 23423856.

It is an arithmetic number, because the mean of its divisors is an integer number (12782580300).

Almost surely, 2^{1021101211320} is an apocalyptic number.

1021101211320 is a gapful number since it is divisible by the number (10) 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 1021101211320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1636170278400).

1021101211320 is an abundant number, since it is smaller than the sum of its proper divisors (2251239345480).

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

1021101211320 is a wasteful number, since it uses less digits than its factorization.

1021101211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43870 (or 43866 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1021101211320 its reverse (231121011201), we get a palindrome (1252222222521).

The spelling of 1021101211320 in words is "one trillion, twenty-one billion, one hundred one million, two hundred eleven thousand, three hundred twenty".