21260680771227 has 4 divisors (see below), whose sum is σ = 28347574361640. Its totient is φ = 14173787180816.

The previous prime is 21260680771151. The next prime is 21260680771241. The reversal of 21260680771227 is 72217708606212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21260680771227 - 2¹⁸ = 21260680509083 is a prime.

It is a super-2 number, since 2×21260680771227² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21260680771227.

It is not an unprimeable number, because it can be changed into a prime (21260680771277) 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 3 ways as a sum of consecutive naturals, for example, 3543446795202 + ... + 3543446795207.

It is an arithmetic number, because the mean of its divisors is an integer number (7086893590410).

Almost surely, 2^{21260680771227} is an apocalyptic number.

21260680771227 is a deficient number, since it is larger than the sum of its proper divisors (7086893590413).

21260680771227 is an equidigital number, since it uses as much as digits as its factorization.

21260680771227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7086893590412.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 21260680771227 in words is "twenty-one trillion, two hundred sixty billion, six hundred eighty million, seven hundred seventy-one thousand, two hundred twenty-seven".