21622131441251 has 16 divisors (see below), whose sum is σ = 24316169569920. Its totient is φ = 19058619309120.

The previous prime is 21622131441227. The next prime is 21622131441269. The reversal of 21622131441251 is 15214413122612.

It is a cyclic number.

It is not a de Polignac number, because 21622131441251 - 2¹⁸ = 21622131179107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622131441271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228144905 + ... + 228239658.

It is an arithmetic number, because the mean of its divisors is an integer number (1519760598120).

Almost surely, 2^{21622131441251} is an apocalyptic number.

21622131441251 is a deficient number, since it is larger than the sum of its proper divisors (2694038128669).

21622131441251 is a wasteful number, since it uses less digits than its factorization.

21622131441251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456384706.

The product of its digits is 23040, while the sum is 35.

Adding to 21622131441251 its reverse (15214413122612), we get a palindrome (36836544563863).

The spelling of 21622131441251 in words is "twenty-one trillion, six hundred twenty-two billion, one hundred thirty-one million, four hundred forty-one thousand, two hundred fifty-one".