12009721252 has 24 divisors (see below), whose sum is σ = 21350367360. Its totient is φ = 5910097440.

The previous prime is 12009721219. The next prime is 12009721277. The reversal of 12009721252 is 25212790021.

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, 40227 + ... + 160117.

It is an arithmetic number, because the mean of its divisors is an integer number (889598640).

Almost surely, 2^12009721252 is an apocalyptic number.

It is an amenable number.

12009721252 is a deficient number, since it is larger than the sum of its proper divisors (9340646108).

12009721252 is a wasteful number, since it uses less digits than its factorization.

12009721252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120291 (or 120289 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 12009721252 in words is "twelve billion, nine million, seven hundred twenty-one thousand, two hundred fifty-two".