12220878136 has 8 divisors (see below), whose sum is σ = 22914146520. Its totient is φ = 6110439064.

The previous prime is 12220878133. The next prime is 12220878151. The reversal of 12220878136 is 63187802221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220878133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763804876 + ... + 763804891.

It is an arithmetic number, because the mean of its divisors is an integer number (2864268315).

Almost surely, 2^12220878136 is an apocalyptic number.

It is an amenable number.

12220878136 is a deficient number, since it is larger than the sum of its proper divisors (10693268384).

12220878136 is a wasteful number, since it uses less digits than its factorization.

12220878136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527609773 (or 1527609769 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 12220878136 in words is "twelve billion, two hundred twenty million, eight hundred seventy-eight thousand, one hundred thirty-six".