12216625228 has 24 divisors (see below), whose sum is σ = 21628585440. Its totient is φ = 6037088640.

The previous prime is 12216625219. The next prime is 12216625271. The reversal of 12216625228 is 82252661221.

It is a super-2 number, since 2×12216625228² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027558 + ... + 1039378.

It is an arithmetic number, because the mean of its divisors is an integer number (901191060).

Almost surely, 2^12216625228 is an apocalyptic number.

It is an amenable number.

12216625228 is a deficient number, since it is larger than the sum of its proper divisors (9411960212).

12216625228 is a wasteful number, since it uses less digits than its factorization.

12216625228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14817 (or 14815 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The spelling of 12216625228 in words is "twelve billion, two hundred sixteen million, six hundred twenty-five thousand, two hundred twenty-eight".