21116012154625 has 16 divisors (see below), whose sum is σ = 26353896791040. Its totient is φ = 16892095863600.

The previous prime is 21116012154623. The next prime is 21116012154689. The reversal of 21116012154625 is 52645121061112.

It is not a de Polignac number, because 21116012154625 - 2¹ = 21116012154623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21116012154623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589555 + ... + 6525304.

It is an arithmetic number, because the mean of its divisors is an integer number (1647118549440).

Almost surely, 2^{21116012154625} is an apocalyptic number.

21116012154625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21116012154625 is a deficient number, since it is larger than the sum of its proper divisors (5237884636415).

21116012154625 is an equidigital number, since it uses as much as digits as its factorization.

21116012154625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138617 (or 7138607 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 21116012154625 in words is "twenty-one trillion, one hundred sixteen billion, twelve million, one hundred fifty-four thousand, six hundred twenty-five".