21252335201 has 2 divisors, whose sum is σ = 21252335202. Its totient is φ = 21252335200.

The previous prime is 21252335161. The next prime is 21252335207. The reversal of 21252335201 is 10253325212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21235484176 + 16851025 = 145724^2 + 4105^2 .

It is a cyclic number.

It is not a de Polignac number, because 21252335201 - 2³⁴ = 4072466017 is a prime.

It is not a weakly prime, because it can be changed into another prime (21252335207) 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 as a sum of consecutive naturals, namely, 10626167600 + 10626167601.

It is an arithmetic number, because the mean of its divisors is an integer number (10626167601).

Almost surely, 2^21252335201 is an apocalyptic number.

It is an amenable number.

21252335201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21252335201 is an equidigital number, since it uses as much as digits as its factorization.

21252335201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 21252335201 in words is "twenty-one billion, two hundred fifty-two million, three hundred thirty-five thousand, two hundred one".