21156192141216 has 48 divisors (see below), whose sum is σ = 60583641134688. Its totient is φ = 6410967315200.

The previous prime is 21156192141181. The next prime is 21156192141257. The reversal of 21156192141216 is 61214129165112.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 10017135375 + ... + 10017137486.

It is an arithmetic number, because the mean of its divisors is an integer number (1262159190306).

Almost surely, 2^{21156192141216} is an apocalyptic number.

It is an amenable number.

21156192141216 is an abundant number, since it is smaller than the sum of its proper divisors (39427448993472).

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

21156192141216 is a wasteful number, since it uses less digits than its factorization.

21156192141216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20034272885 (or 20034272877 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The spelling of 21156192141216 in words is "twenty-one trillion, one hundred fifty-six billion, one hundred ninety-two million, one hundred forty-one thousand, two hundred sixteen".