21514411252251 has 12 divisors (see below), whose sum is σ = 32711970325320. Its totient is φ = 13588049211840.

The previous prime is 21514411252249. The next prime is 21514411252297. The reversal of 21514411252251 is 15225211441512.

21514411252251 is a `hidden beast` number, since 2 + 1 + 5 + 14 + 4 + 112 + 522 + 5 + 1 = 666.

It is not a de Polignac number, because 21514411252251 - 2¹ = 21514411252249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21514411252211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62907635070 + ... + 62907635411.

It is an arithmetic number, because the mean of its divisors is an integer number (2725997527110).

Almost surely, 2^{21514411252251} is an apocalyptic number.

21514411252251 is a deficient number, since it is larger than the sum of its proper divisors (11197559073069).

21514411252251 is a wasteful number, since it uses less digits than its factorization.

21514411252251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125815270506 (or 125815270503 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

Adding to 21514411252251 its reverse (15225211441512), we get a palindrome (36739622693763).

The spelling of 21514411252251 in words is "twenty-one trillion, five hundred fourteen billion, four hundred eleven million, two hundred fifty-two thousand, two hundred fifty-one".