1231533113125 has 40 divisors (see below), whose sum is σ = 1774335081024. Its totient is φ = 837006240000.

The previous prime is 1231533113119. The next prime is 1231533113137. The reversal of 1231533113125 is 5213113351321.

It is not a de Polignac number, because 1231533113125 - 2²³ = 1231524724517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 751171 + ... + 1739920.

Almost surely, 2^{1231533113125} is an apocalyptic number.

It is an amenable number.

1231533113125 is a deficient number, since it is larger than the sum of its proper divisors (542801967899).

1231533113125 is an equidigital number, since it uses as much as digits as its factorization.

1231533113125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491231 (or 2491216 counting only the distinct ones).

The product of its digits is 8100, while the sum is 31.

Adding to 1231533113125 its reverse (5213113351321), we get a palindrome (6444646464446).

The spelling of 1231533113125 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-three million, one hundred thirteen thousand, one hundred twenty-five".