21116012154650 has 96 divisors (see below), whose sum is σ = 45188608458240. Its totient is φ = 7191157821120.

The previous prime is 21116012154623. The next prime is 21116012154689. The reversal of 21116012154650 is 5645121061112.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 21116012154650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55129097 + ... + 55510803.

It is an arithmetic number, because the mean of its divisors is an integer number (470714671440).

Almost surely, 2^{21116012154650} is an apocalyptic number.

21116012154650 is an abundant number, since it is smaller than the sum of its proper divisors (24072596303590).

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

21116012154650 is a wasteful number, since it uses less digits than its factorization.

21116012154650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382788 (or 382783 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 21116012154650 in words is "twenty-one trillion, one hundred sixteen billion, twelve million, one hundred fifty-four thousand, six hundred fifty".