100101120000021 has 24 divisors (see below), whose sum is σ = 165272223118080. Its totient is φ = 57191664305376.

The previous prime is 100101120000017. The next prime is 100101120000053. The reversal of 100101120000021 is 120000021101001.

It is a happy number.

It is not a de Polignac number, because 100101120000021 - 2² = 100101120000017 is a prime.

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 = 100101119999958 and 100101120000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100101120004021) 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, 124257741 + ... + 125060738.

It is an arithmetic number, because the mean of its divisors is an integer number (6886342629920).

Almost surely, 2^{100101120000021} is an apocalyptic number.

It is an amenable number.

100101120000021 is a deficient number, since it is larger than the sum of its proper divisors (65171103118059).

100101120000021 is a wasteful number, since it uses less digits than its factorization.

100101120000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249324865 (or 249324862 counting only the distinct ones).

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

Adding to 100101120000021 its reverse (120000021101001), we get a palindrome (220101141101022).

The spelling of 100101120000021 in words is "one hundred trillion, one hundred one billion, one hundred twenty million, twenty-one", and thus it is an aban number.