21131012202227 has 2 divisors, whose sum is σ = 21131012202228. Its totient is φ = 21131012202226.

The previous prime is 21131012202217. The next prime is 21131012202247. The reversal of 21131012202227 is 72220221013112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21131012202227 - 2⁴ = 21131012202211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21131012202196 and 21131012202205.

It is not a weakly prime, because it can be changed into another prime (21131012202217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565506101113 + 10565506101114.

It is an arithmetic number, because the mean of its divisors is an integer number (10565506101114).

Almost surely, 2^{21131012202227} is an apocalyptic number.

21131012202227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131012202227 is an equidigital number, since it uses as much as digits as its factorization.

21131012202227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 21131012202227 its reverse (72220221013112), we get a palindrome (93351233215339).

The spelling of 21131012202227 in words is "twenty-one trillion, one hundred thirty-one billion, twelve million, two hundred two thousand, two hundred twenty-seven".