21552324211251 has 12 divisors (see below), whose sum is σ = 31278675898600. Its totient is φ = 14300120328480.

The previous prime is 21552324211211. The next prime is 21552324211273. The reversal of 21552324211251 is 15211242325512.

21552324211251 is a `hidden beast` number, since 2 + 1 + 5 + 523 + 2 + 4 + 2 + 1 + 125 + 1 = 666.

It is not a de Polignac number, because 21552324211251 - 2¹⁰ = 21552324210227 is a prime.

It is a super-3 number, since 3×21552324211251³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21552324211211) 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, 5674649026 + ... + 5674652823.

Almost surely, 2^{21552324211251} is an apocalyptic number.

21552324211251 is a deficient number, since it is larger than the sum of its proper divisors (9726351687349).

21552324211251 is a wasteful number, since it uses less digits than its factorization.

21552324211251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11349302066 (or 11349302063 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 21552324211251 its reverse (15211242325512), we get a palindrome (36763566536763).

The spelling of 21552324211251 in words is "twenty-one trillion, five hundred fifty-two billion, three hundred twenty-four million, two hundred eleven thousand, two hundred fifty-one".