21116100655075 has 12 divisors (see below), whose sum is σ = 26240763014928. Its totient is φ = 16856236522400.

The previous prime is 21116100655061. The next prime is 21116100655079. The reversal of 21116100655075 is 57055600161112.

It is a de Polignac number, because none of the positive numbers 2^k-21116100655075 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21116100655079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916088287 + ... + 916111336.

It is an arithmetic number, because the mean of its divisors is an integer number (2186730251244).

Almost surely, 2^{21116100655075} is an apocalyptic number.

21116100655075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21116100655075 is a deficient number, since it is larger than the sum of its proper divisors (5124662359853).

21116100655075 is a wasteful number, since it uses less digits than its factorization.

21116100655075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832200094 (or 1832200089 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 40.

The spelling of 21116100655075 in words is "twenty-one trillion, one hundred sixteen billion, one hundred million, six hundred fifty-five thousand, seventy-five".