21356241977112 has 64 divisors (see below), whose sum is σ = 61107172519680. Its totient is φ = 6092849592192.

The previous prime is 21356241977053. The next prime is 21356241977143. The reversal of 21356241977112 is 21177914265312.

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, 92945643 + ... + 93175130.

It is an arithmetic number, because the mean of its divisors is an integer number (954799570620).

Almost surely, 2^{21356241977112} is an apocalyptic number.

It is an amenable number.

21356241977112 is an abundant number, since it is smaller than the sum of its proper divisors (39750930542568).

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

21356241977112 is a wasteful number, since it uses less digits than its factorization.

21356241977112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186121472 (or 186121468 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The spelling of 21356241977112 in words is "twenty-one trillion, three hundred fifty-six billion, two hundred forty-one million, nine hundred seventy-seven thousand, one hundred twelve".