252120520401 has 4 divisors (see below), whose sum is σ = 336160693872. Its totient is φ = 168080346932.

The previous prime is 252120520391. The next prime is 252120520409. The reversal of 252120520401 is 104025021252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252120520401 - 2⁵ = 252120520369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252120520409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42020086731 + ... + 42020086736.

It is an arithmetic number, because the mean of its divisors is an integer number (84040173468).

Almost surely, 2^252120520401 is an apocalyptic number.

It is an amenable number.

252120520401 is a deficient number, since it is larger than the sum of its proper divisors (84040173471).

252120520401 is an equidigital number, since it uses as much as digits as its factorization.

252120520401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84040173470.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 252120520401 its reverse (104025021252), we get a palindrome (356145541653).

The spelling of 252120520401 in words is "two hundred fifty-two billion, one hundred twenty million, five hundred twenty thousand, four hundred one".