21112665504336 has 60 divisors (see below), whose sum is σ = 67527017449632. Its totient is φ = 6032190143808.

The previous prime is 21112665504223. The next prime is 21112665504379. The reversal of 21112665504336 is 63340556621112.

It is a happy number.

21112665504336 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 2 + 66 + 550 + 4 + 3 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21112665504291 and 21112665504300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10472551326 + ... + 10472553341.

Almost surely, 2^{21112665504336} is an apocalyptic number.

It is an amenable number.

21112665504336 is an abundant number, since it is smaller than the sum of its proper divisors (46414351945296).

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

21112665504336 is a wasteful number, since it uses less digits than its factorization.

21112665504336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20945104688 (or 20945104679 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 21112665504336 in words is "twenty-one trillion, one hundred twelve billion, six hundred sixty-five million, five hundred four thousand, three hundred thirty-six".