21116166160104 has 56 divisors (see below), whose sum is σ = 59362061778210. Its totient is φ = 7038722051424.

The previous prime is 21116166160073. The next prime is 21116166160157. The reversal of 21116166160104 is 40106166161112.

21116166160104 is a `hidden beast` number, since 2 + 1 + 1 + 16 + 16 + 616 + 0 + 10 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13006827824004 + 8109338336100 = 3606498^2 + 2847690^2 .

It is a super-2 number, since 2×21116166160104² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1810365067 + ... + 1810376730.

Almost surely, 2^{21116166160104} is an apocalyptic number.

21116166160104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21116166160104 is an abundant number, since it is smaller than the sum of its proper divisors (38245895618106).

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

21116166160104 is an equidigital number, since it uses as much as digits as its factorization.

21116166160104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620741821 (or 3620741802 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 21116166160104 in words is "twenty-one trillion, one hundred sixteen billion, one hundred sixty-six million, one hundred sixty thousand, one hundred four".