21977929283112 has 128 divisors (see below), whose sum is σ = 69495428736000. Its totient is φ = 6370414269120.

The previous prime is 21977929283111. The next prime is 21977929283119. The reversal of 21977929283112 is 21138292977912.

21977929283112 is a `hidden beast` number, since 2 + 1 + 97 + 79 + 292 + 83 + 112 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21977929283112.

It is not an unprimeable number, because it can be changed into a prime (21977929283111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201031662 + ... + 201140957.

It is an arithmetic number, because the mean of its divisors is an integer number (542933037000).

Almost surely, 2^{21977929283112} is an apocalyptic number.

21977929283112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21977929283112 is an abundant number, since it is smaller than the sum of its proper divisors (47517499452888).

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

21977929283112 is a wasteful number, since it uses less digits than its factorization.

21977929283112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402172668 (or 402172658 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The spelling of 21977929283112 in words is "twenty-one trillion, nine hundred seventy-seven billion, nine hundred twenty-nine million, two hundred eighty-three thousand, one hundred twelve".