12122211985 has 48 divisors (see below), whose sum is σ = 16516168704. Its totient is φ = 8521134336.

The previous prime is 12122211977. The next prime is 12122211989. The reversal of 12122211985 is 58911222121.

It is a happy number.

It is not a de Polignac number, because 12122211985 - 2³ = 12122211977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122211985.

It is not an unprimeable number, because it can be changed into a prime (12122211989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4332607 + ... + 4335403.

It is an arithmetic number, because the mean of its divisors is an integer number (344086848).

Almost surely, 2^12122211985 is an apocalyptic number.

It is an amenable number.

12122211985 is a deficient number, since it is larger than the sum of its proper divisors (4393956719).

12122211985 is a wasteful number, since it uses less digits than its factorization.

12122211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074 (or 3061 counting only the distinct ones).

The product of its digits is 5760, while the sum is 34.

The spelling of 12122211985 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-five".