100021111000121 has 24 divisors (see below), whose sum is σ = 110872677277440. Its totient is φ = 90042730883072.

The previous prime is 100021111000093. The next prime is 100021111000201. The reversal of 100021111000121 is 121000111120001.

It is not a de Polignac number, because 100021111000121 - 2²² = 100021106805817 is a prime.

It is a super-2 number, since 2×100021111000121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021111000021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 402198665 + ... + 402447273.

It is an arithmetic number, because the mean of its divisors is an integer number (4619694886560).

Almost surely, 2^{100021111000121} is an apocalyptic number.

It is an amenable number.

100021111000121 is a deficient number, since it is larger than the sum of its proper divisors (10851566277319).

100021111000121 is a wasteful number, since it uses less digits than its factorization.

100021111000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309193 (or 309176 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 100021111000121 its reverse (121000111120001), we get a palindrome (221021222120122).

The spelling of 100021111000121 in words is "one hundred trillion, twenty-one billion, one hundred eleven million, one hundred twenty-one", and thus it is an aban number.