20120221031112 has 48 divisors (see below), whose sum is σ = 56861494223040. Its totient is φ = 6415142936928.

The previous prime is 20120221031093. The next prime is 20120221031159. The reversal of 20120221031112 is 21113012202102.

20120221031112 is a `hidden beast` number, since 2 + 0 + 120 + 221 + 0 + 311 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6074944308 + ... + 6074947619.

It is an arithmetic number, because the mean of its divisors is an integer number (1184614462980).

Almost surely, 2^{20120221031112} is an apocalyptic number.

It is an amenable number.

20120221031112 is an abundant number, since it is smaller than the sum of its proper divisors (36741273191928).

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

20120221031112 is a wasteful number, since it uses less digits than its factorization.

20120221031112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12149891962 (or 12149891955 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20120221031112 its reverse (21113012202102), we get a palindrome (41233233233214).

The spelling of 20120221031112 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, thirty-one thousand, one hundred twelve".