100100021000121 has 12 divisors (see below), whose sum is σ = 144724938915648. Its totient is φ = 66670569013464.

The previous prime is 100100021000107. The next prime is 100100021000131. The reversal of 100100021000121 is 121000120001001.

It is a happy number.

It is not a de Polignac number, because 100100021000121 - 2²⁷ = 100099886782393 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100100021000131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5231516565 + ... + 5231535698.

It is an arithmetic number, because the mean of its divisors is an integer number (12060411576304).

Almost surely, 2^{100100021000121} is an apocalyptic number.

It is an amenable number.

100100021000121 is a deficient number, since it is larger than the sum of its proper divisors (44624917915527).

100100021000121 is a wasteful number, since it uses less digits than its factorization.

100100021000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463053332 (or 10463053329 counting only the distinct ones).

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

Adding to 100100021000121 its reverse (121000120001001), we get a palindrome (221100141001122).

The spelling of 100100021000121 in words is "one hundred trillion, one hundred billion, twenty-one million, one hundred twenty-one", and thus it is an aban number.