1213530112544 has 24 divisors (see below), whose sum is σ = 2402947462860. Its totient is φ = 603257741056.

The previous prime is 1213530112511. The next prime is 1213530112567. The reversal of 1213530112544 is 4452110353121.

It can be written as a sum of positive squares in 2 ways, for example, as 1103298144400 + 110231968144 = 1050380^2 + 332012^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1213530112544.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109597979 + ... + 109609050.

Almost surely, 2^{1213530112544} is an apocalyptic number.

It is an amenable number.

1213530112544 is a deficient number, since it is larger than the sum of its proper divisors (1189417350316).

1213530112544 is a wasteful number, since it uses less digits than its factorization.

1213530112544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219207212 (or 219207204 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1213530112544 its reverse (4452110353121), we get a palindrome (5665640465665).

The spelling of 1213530112544 in words is "one trillion, two hundred thirteen billion, five hundred thirty million, one hundred twelve thousand, five hundred forty-four".