12311111201985 has 40 divisors (see below), whose sum is σ = 22072005052416. Its totient is φ = 6564974412960.

The previous prime is 12311111201971. The next prime is 12311111202001. The reversal of 12311111201985 is 58910211111321.

12311111201985 is a `hidden beast` number, since 1 + 231 + 111 + 120 + 198 + 5 = 666.

12311111201985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12311111201985 - 2⁴ = 12311111201969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 599722 + ... + 4998188.

Almost surely, 2^{12311111201985} is an apocalyptic number.

12311111201985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12311111201985 is a deficient number, since it is larger than the sum of its proper divisors (9760893850431).

12311111201985 is an equidigital number, since it uses as much as digits as its factorization.

12311111201985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4405395 (or 4405386 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 36.

The spelling of 12311111201985 in words is "twelve trillion, three hundred eleven billion, one hundred eleven million, two hundred one thousand, nine hundred eighty-five".