101012120021 has 16 divisors (see below), whose sum is σ = 111290609664. Its totient is φ = 91291809024.

The previous prime is 101012120017. The next prime is 101012120093. The reversal of 101012120021 is 120021210101.

It is a cyclic number.

It is not a de Polignac number, because 101012120021 - 2² = 101012120017 is a prime.

It is a super-2 number, since 2×101012120021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101012119984 and 101012120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101012120621) 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, 1150325 + ... + 1235018.

It is an arithmetic number, because the mean of its divisors is an integer number (6955663104).

Almost surely, 2^101012120021 is an apocalyptic number.

It is an amenable number.

101012120021 is a deficient number, since it is larger than the sum of its proper divisors (10278489643).

101012120021 is a wasteful number, since it uses less digits than its factorization.

101012120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385460.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101012120021 its reverse (120021210101), we get a palindrome (221033330122).

The spelling of 101012120021 in words is "one hundred one billion, twelve million, one hundred twenty thousand, twenty-one".