21211022113 has 2 divisors, whose sum is σ = 21211022114. Its totient is φ = 21211022112.

The previous prime is 21211022071. The next prime is 21211022141. The reversal of 21211022113 is 31122011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21206058129 + 4963984 = 145623^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211022113 - 2¹³ = 21211013921 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211032113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605511056 + 10605511057.

It is an arithmetic number, because the mean of its divisors is an integer number (10605511057).

Almost surely, 2^21211022113 is an apocalyptic number.

It is an amenable number.

21211022113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211022113 is an equidigital number, since it uses as much as digits as its factorization.

21211022113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211022113 its reverse (31122011212), we get a palindrome (52333033325).

The spelling of 21211022113 in words is "twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred thirteen".