21452501201 has 2 divisors, whose sum is σ = 21452501202. Its totient is φ = 21452501200.

The previous prime is 21452501183. The next prime is 21452501207. The reversal of 21452501201 is 10210525412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18609052225 + 2843448976 = 136415^2 + 53324^2 .

It is a cyclic number.

It is not a de Polignac number, because 21452501201 - 2²⁶ = 21385392337 is a prime.

It is not a weakly prime, because it can be changed into another prime (21452501207) 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, 10726250600 + 10726250601.

It is an arithmetic number, because the mean of its divisors is an integer number (10726250601).

Almost surely, 2^21452501201 is an apocalyptic number.

It is an amenable number.

21452501201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21452501201 is an equidigital number, since it uses as much as digits as its factorization.

21452501201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 21452501201 in words is "twenty-one billion, four hundred fifty-two million, five hundred one thousand, two hundred one".