21462581113 has 2 divisors, whose sum is σ = 21462581114. Its totient is φ = 21462581112.

The previous prime is 21462581111. The next prime is 21462581159. The reversal of 21462581113 is 31118526412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15597012544 + 5865568569 = 124888^2 + 76587^2 .

It is a cyclic number.

It is not a de Polignac number, because 21462581113 - 2¹ = 21462581111 is a prime.

Together with 21462581111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21462581111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10731290556 + 10731290557.

It is an arithmetic number, because the mean of its divisors is an integer number (10731290557).

Almost surely, 2^21462581113 is an apocalyptic number.

It is an amenable number.

21462581113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21462581113 is an equidigital number, since it uses as much as digits as its factorization.

21462581113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The spelling of 21462581113 in words is "twenty-one billion, four hundred sixty-two million, five hundred eighty-one thousand, one hundred thirteen".