101210100120021 has 16 divisors (see below), whose sum is σ = 135169425710720. Its totient is φ = 67362091352640.

The previous prime is 101210100120011. The next prime is 101210100120023. The reversal of 101210100120021 is 120021001012101.

It is not a de Polignac number, because 101210100120021 - 2⁷ = 101210100119893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101210100119979 and 101210100120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210100120023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105650016 + ... + 106603686.

It is an arithmetic number, because the mean of its divisors is an integer number (8448089106920).

Almost surely, 2^{101210100120021} is an apocalyptic number.

It is an amenable number.

101210100120021 is a deficient number, since it is larger than the sum of its proper divisors (33959325590699).

101210100120021 is an equidigital number, since it uses as much as digits as its factorization.

101210100120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011996.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101210100120021 its reverse (120021001012101), we get a palindrome (221231101132122).

The spelling of 101210100120021 in words is "one hundred one trillion, two hundred ten billion, one hundred million, one hundred twenty thousand, twenty-one".