21274551017131 has 2 divisors, whose sum is σ = 21274551017132. Its totient is φ = 21274551017130.

The previous prime is 21274551017053. The next prime is 21274551017249. The reversal of 21274551017131 is 13171015547212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21274551017131 - 2⁷ = 21274551017003 is a prime.

It is a super-2 number, since 2×21274551017131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21274551017431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637275508565 + 10637275508566.

It is an arithmetic number, because the mean of its divisors is an integer number (10637275508566).

Almost surely, 2^{21274551017131} is an apocalyptic number.

21274551017131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21274551017131 is an equidigital number, since it uses as much as digits as its factorization.

21274551017131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 21274551017131 in words is "twenty-one trillion, two hundred seventy-four billion, five hundred fifty-one million, seventeen thousand, one hundred thirty-one".