12117661700 has 18 divisors (see below), whose sum is σ = 26295326106. Its totient is φ = 4847064640.

The previous prime is 12117661691. The next prime is 12117661733. The reversal of 12117661700 is 716671121.

It can be written as a sum of positive squares in 3 ways, for example, as 495616 + 12117166084 = 704^2 + 110078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60588209 + ... + 60588408.

Almost surely, 2^12117661700 is an apocalyptic number.

12117661700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12117661700 is an abundant number, since it is smaller than the sum of its proper divisors (14177664406).

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

12117661700 is a wasteful number, since it uses less digits than its factorization.

12117661700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121176631 (or 121176624 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 12117661700 in words is "twelve billion, one hundred seventeen million, six hundred sixty-one thousand, seven hundred".