21116012154656 has 48 divisors (see below), whose sum is σ = 41760276445440. Its totient is φ = 10510242220800.

The previous prime is 21116012154623. The next prime is 21116012154689. The reversal of 21116012154656 is 65645121061112.

It is an interprime number because it is at equal distance from previous prime (21116012154623) and next prime (21116012154689).

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, 46872881 + ... + 47321231.

It is an arithmetic number, because the mean of its divisors is an integer number (870005759280).

Almost surely, 2^{21116012154656} is an apocalyptic number.

It is an amenable number.

21116012154656 is a deficient number, since it is larger than the sum of its proper divisors (20644264290784).

21116012154656 is a wasteful number, since it uses less digits than its factorization.

21116012154656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455017 (or 455009 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 21116012154656 in words is "twenty-one trillion, one hundred sixteen billion, twelve million, one hundred fifty-four thousand, six hundred fifty-six".