12221220001985 has 32 divisors (see below), whose sum is σ = 14962703007264. Its totient is φ = 9580052736000.

The previous prime is 12221220001967. The next prime is 12221220002023. The reversal of 12221220001985 is 58910002212221.

It is a happy number.

12221220001985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 11490771158416 + 730448843569 = 3389804^2 + 854663^2 .

It is not a de Polignac number, because 12221220001985 - 2²² = 12221215807681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537397715 + ... + 537420455.

It is an arithmetic number, because the mean of its divisors is an integer number (467584468977).

Almost surely, 2^{12221220001985} is an apocalyptic number.

It is an amenable number.

12221220001985 is a deficient number, since it is larger than the sum of its proper divisors (2741483005279).

12221220001985 is a wasteful number, since it uses less digits than its factorization.

12221220001985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29445.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 12221220001985 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one thousand, nine hundred eighty-five".