1021100001012 has 120 divisors (see below), whose sum is σ = 3285362681216. Its totient is φ = 269301091392.

The previous prime is 1021100001011. The next prime is 1021100001067. The reversal of 1021100001012 is 2101000011201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1021100000985 and 1021100001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100001011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17286688 + ... + 17345655.

Almost surely, 2^{1021100001012} is an apocalyptic number.

1021100001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021100001012 is an abundant number, since it is smaller than the sum of its proper divisors (2264262680204).

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

1021100001012 is a wasteful number, since it uses less digits than its factorization.

1021100001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34632379 (or 34632368 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1021100001012 its reverse (2101000011201), we get a palindrome (3122100012213).

The spelling of 1021100001012 in words is "one trillion, twenty-one billion, one hundred million, one thousand, twelve".