13155250025421 has 40 divisors (see below), whose sum is σ = 22459651269440. Its totient is φ = 7517084876352.

The previous prime is 13155250025347. The next prime is 13155250025503. The reversal of 13155250025421 is 12452005255131.

13155250025421 is a `hidden beast` number, since 1 + 3 + 1 + 552 + 50 + 0 + 2 + 54 + 2 + 1 = 666.

It is not a de Polignac number, because 13155250025421 - 2¹³ = 13155250017229 is a prime.

It is a super-2 number, since 2×13155250025421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13155250025521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22395150 + ... + 22975056.

It is an arithmetic number, because the mean of its divisors is an integer number (561491281736).

Almost surely, 2^{13155250025421} is an apocalyptic number.

It is an amenable number.

13155250025421 is a deficient number, since it is larger than the sum of its proper divisors (9304401244019).

13155250025421 is an equidigital number, since it uses as much as digits as its factorization.

13155250025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619935 (or 619926 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 13155250025421 in words is "thirteen trillion, one hundred fifty-five billion, two hundred fifty million, twenty-five thousand, four hundred twenty-one".