21122100711 has 12 divisors (see below), whose sum is σ = 30511633360. Its totient is φ = 14080508640.

The previous prime is 21122100707. The next prime is 21122100743. The reversal of 21122100711 is 11700122112.

It is not a de Polignac number, because 21122100711 - 2² = 21122100707 is a prime.

It is a super-2 number, since 2×21122100711² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122100781) 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 11 ways as a sum of consecutive naturals, for example, 96291 + ... + 226971.

Almost surely, 2^21122100711 is an apocalyptic number.

21122100711 is a deficient number, since it is larger than the sum of its proper divisors (9389532649).

21122100711 is a wasteful number, since it uses less digits than its factorization.

21122100711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148646 (or 148643 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

Adding to 21122100711 its reverse (11700122112), we get a palindrome (32822222823).

The spelling of 21122100711 in words is "twenty-one billion, one hundred twenty-two million, one hundred thousand, seven hundred eleven".