1213242305252 has 36 divisors (see below), whose sum is σ = 2154437724348. Its totient is φ = 597759624000.

The previous prime is 1213242305251. The next prime is 1213242305263. The reversal of 1213242305252 is 2525032423121.

It can be written as a sum of positive squares in 2 ways, for example, as 621410583616 + 591831721636 = 788296^2 + 769306^2 .

It is not an unprimeable number, because it can be changed into a prime (1213242305251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17952758 + ... + 18020210.

It is an arithmetic number, because the mean of its divisors is an integer number (59845492343).

Almost surely, 2^{1213242305252} is an apocalyptic number.

It is an amenable number.

1213242305252 is a deficient number, since it is larger than the sum of its proper divisors (941195419096).

1213242305252 is a wasteful number, since it uses less digits than its factorization.

1213242305252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67980 (or 67767 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 1213242305252 its reverse (2525032423121), we get a palindrome (3738274728373).

The spelling of 1213242305252 in words is "one trillion, two hundred thirteen billion, two hundred forty-two million, three hundred five thousand, two hundred fifty-two".