12221542508 has 12 divisors (see below), whose sum is σ = 24443085072. Its totient is φ = 5237803920.

The previous prime is 12221542507. The next prime is 12221542519. The reversal of 12221542508 is 80524512221.

12221542508 is an admirable number.

It is a super-2 number, since 2×12221542508² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12221542507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218241803 + ... + 218241858.

It is an arithmetic number, because the mean of its divisors is an integer number (2036923756).

Almost surely, 2^12221542508 is an apocalyptic number.

It is an amenable number.

12221542508 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221542508 is a wasteful number, since it uses less digits than its factorization.

12221542508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436483672 (or 436483670 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The spelling of 12221542508 in words is "twelve billion, two hundred twenty-one million, five hundred forty-two thousand, five hundred eight".