21152513201 has 4 divisors (see below), whose sum is σ = 22072187712. Its totient is φ = 20232838692.

The previous prime is 21152513197. The next prime is 21152513209. The reversal of 21152513201 is 10231525112.

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 21152513201 - 2² = 21152513197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 919674487 = 21152513201 / (2 + 1 + 1 + 5 + 2 + 5 + 1 + 3 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152513209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459837221 + ... + 459837266.

It is an arithmetic number, because the mean of its divisors is an integer number (5518046928).

Almost surely, 2^21152513201 is an apocalyptic number.

It is an amenable number.

21152513201 is a deficient number, since it is larger than the sum of its proper divisors (919674511).

21152513201 is an equidigital number, since it uses as much as digits as its factorization.

21152513201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919674510.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 21152513201 in words is "twenty-one billion, one hundred fifty-two million, five hundred thirteen thousand, two hundred one".