21157422475112 has 32 divisors (see below), whose sum is σ = 49458909683520. Its totient is φ = 8243151613440.

The previous prime is 21157422475051. The next prime is 21157422475187.

21157422475112 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17173231913 + ... + 17173233144.

It is an arithmetic number, because the mean of its divisors is an integer number (1545590927610).

Almost surely, 2^{21157422475112} is an apocalyptic number.

21157422475112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21157422475112 is an abundant number, since it is smaller than the sum of its proper divisors (28301487208408).

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

21157422475112 is a wasteful number, since it uses less digits than its factorization.

21157422475112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34346465081 (or 34346465077 counting only the distinct ones).

The product of its digits is 313600, while the sum is 44.

The spelling of 21157422475112 in words is "twenty-one trillion, one hundred fifty-seven billion, four hundred twenty-two million, four hundred seventy-five thousand, one hundred twelve".