21167105112 has 64 divisors (see below), whose sum is σ = 59603004000. Its totient is φ = 6959043072.

The previous prime is 21167105053. The next prime is 21167105143. The reversal of 21167105112 is 21150176112.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 655437 + ... + 686972.

Almost surely, 2^21167105112 is an apocalyptic number.

It is an amenable number.

21167105112 is an abundant number, since it is smaller than the sum of its proper divisors (38435898888).

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

21167105112 is a wasteful number, since it uses less digits than its factorization.

21167105112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342497 (or 1342487 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

The spelling of 21167105112 in words is "twenty-one billion, one hundred sixty-seven million, one hundred five thousand, one hundred twelve".