20101012120 has 64 divisors (see below), whose sum is σ = 51704052480. Its totient is φ = 6889677696.

The previous prime is 20101012111. The next prime is 20101012207. The reversal of 20101012120 is 2121010102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20101012097 and 20101012106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1118647 + ... + 1136473.

It is an arithmetic number, because the mean of its divisors is an integer number (807875820).

Almost surely, 2^20101012120 is an apocalyptic number.

20101012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101012120 is an abundant number, since it is smaller than the sum of its proper divisors (31603040360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101012120 is a wasteful number, since it uses less digits than its factorization.

20101012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21872 (or 21868 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20101012120 its reverse (2121010102), we get a palindrome (22222022222).

The spelling of 20101012120 in words is "twenty billion, one hundred one million, twelve thousand, one hundred twenty".