252220054121 has 4 divisors (see below), whose sum is σ = 288251490432. Its totient is φ = 216188617812.

The previous prime is 252220054003. The next prime is 252220054147. The reversal of 252220054121 is 121450022252.

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 252220054121 - 2³⁴ = 235040184937 is a prime.

It is a super-2 number, since 2×252220054121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252220054421) 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, 18015718145 + ... + 18015718158.

It is an arithmetic number, because the mean of its divisors is an integer number (72062872608).

Almost surely, 2^252220054121 is an apocalyptic number.

It is an amenable number.

252220054121 is a deficient number, since it is larger than the sum of its proper divisors (36031436311).

252220054121 is an equidigital number, since it uses as much as digits as its factorization.

252220054121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36031436310.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 252220054121 its reverse (121450022252), we get a palindrome (373670076373).

The spelling of 252220054121 in words is "two hundred fifty-two billion, two hundred twenty million, fifty-four thousand, one hundred twenty-one".