12012499252 has 18 divisors (see below), whose sum is σ = 22640430498. Its totient is φ = 5543865648.

The previous prime is 12012499249. The next prime is 12012499259. The reversal of 12012499252 is 25299421021.

It can be written as a sum of positive squares in only one way, i.e., 8316345636 + 3696153616 = 91194^2 + 60796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012499259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 782749 + ... + 797947.

Almost surely, 2^12012499252 is an apocalyptic number.

It is an amenable number.

12012499252 is a deficient number, since it is larger than the sum of its proper divisors (10627931246).

12012499252 is an frugal number, since it uses more digits than its factorization.

12012499252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30415 (or 15214 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 12012499252 in words is "twelve billion, twelve million, four hundred ninety-nine thousand, two hundred fifty-two".