111668136210 has 24 divisors (see below), whose sum is σ = 290337154380. Its totient is φ = 29778169632.

The previous prime is 111668136199. The next prime is 111668136247. The reversal of 111668136210 is 12631866111.

It is a happy number.

111668136210 is a `hidden beast` number, since 1 + 1 + 16 + 6 + 8 + 13 + 621 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98096119209 + 13572017001 = 313203^2 + 116499^2 .

It is a super-2 number, since 2×111668136210² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 620378445 + ... + 620378624.

Almost surely, 2^111668136210 is an apocalyptic number.

111668136210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111668136210 is an abundant number, since it is smaller than the sum of its proper divisors (178669018170).

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

111668136210 is a wasteful number, since it uses less digits than its factorization.

111668136210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240757082 (or 1240757079 counting only the distinct ones).

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

The spelling of 111668136210 in words is "one hundred eleven billion, six hundred sixty-eight million, one hundred thirty-six thousand, two hundred ten".