21052153453231 has 2 divisors, whose sum is σ = 21052153453232. Its totient is φ = 21052153453230.

The previous prime is 21052153453187. The next prime is 21052153453301. The reversal of 21052153453231 is 13235435125012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21052153453231 - 2²⁷ = 21052019235503 is a prime.

It is a super-2 number, since 2×21052153453231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21052156453231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526076726615 + 10526076726616.

It is an arithmetic number, because the mean of its divisors is an integer number (10526076726616).

Almost surely, 2^{21052153453231} is an apocalyptic number.

21052153453231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21052153453231 is an equidigital number, since it uses as much as digits as its factorization.

21052153453231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 21052153453231 its reverse (13235435125012), we get a palindrome (34287588578243).

The spelling of 21052153453231 in words is "twenty-one trillion, fifty-two billion, one hundred fifty-three million, four hundred fifty-three thousand, two hundred thirty-one".