252000501021 has 12 divisors (see below), whose sum is σ = 376552473180. Its totient is φ = 162207218880.

The previous prime is 252000501019. The next prime is 252000501043. The reversal of 252000501021 is 120105000252.

It can be written as a sum of positive squares in 2 ways, for example, as 166251092121 + 85749408900 = 407739^2 + 292830^2 .

It is not a de Polignac number, because 252000501021 - 2¹ = 252000501019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252000500985 and 252000501003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252000501721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482759320 + ... + 482759841.

It is an arithmetic number, because the mean of its divisors is an integer number (31379372765).

Almost surely, 2^252000501021 is an apocalyptic number.

It is an amenable number.

252000501021 is a deficient number, since it is larger than the sum of its proper divisors (124551972159).

252000501021 is a wasteful number, since it uses less digits than its factorization.

252000501021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965519196 (or 965519193 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

Adding to 252000501021 its reverse (120105000252), we get a palindrome (372105501273).

The spelling of 252000501021 in words is "two hundred fifty-two billion, five hundred one thousand, twenty-one".