12252139388 has 24 divisors (see below), whose sum is σ = 22242252480. Its totient is φ = 5900993280.

The previous prime is 12252139357. The next prime is 12252139433. The reversal of 12252139388 is 88393125221.

It is a super-2 number, since 2×12252139388² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459881 + ... + 485792.

It is an arithmetic number, because the mean of its divisors is an integer number (926760520).

Almost surely, 2^12252139388 is an apocalyptic number.

It is an amenable number.

12252139388 is a deficient number, since it is larger than the sum of its proper divisors (9990113092).

12252139388 is a wasteful number, since it uses less digits than its factorization.

12252139388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945797 (or 945795 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The spelling of 12252139388 in words is "twelve billion, two hundred fifty-two million, one hundred thirty-nine thousand, three hundred eighty-eight".