1213231252 has 24 divisors (see below), whose sum is σ = 2218067712. Its totient is φ = 579969600.

The previous prime is 1213231249. The next prime is 1213231259. The reversal of 1213231252 is 2521323121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213231259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48649 + ... + 69232.

It is an arithmetic number, because the mean of its divisors is an integer number (92419488).

Almost surely, 2^1213231252 is an apocalyptic number.

It is an amenable number.

1213231252 is a deficient number, since it is larger than the sum of its proper divisors (1004836460).

1213231252 is a wasteful number, since it uses less digits than its factorization.

1213231252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117999 (or 117997 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1213231252 is about 34831.4692770776. The cubic root of 1213231252 is about 1066.5499416978.

Adding to 1213231252 its reverse (2521323121), we get a palindrome (3734554373).

The spelling of 1213231252 in words is "one billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred fifty-two".