21101311122 has 32 divisors (see below), whose sum is σ = 44837841600. Its totient is φ = 6607677888.

The previous prime is 21101311117. The next prime is 21101311123. The reversal of 21101311122 is 22111310112.

It is not an unprimeable number, because it can be changed into a prime (21101311123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632372 + ... + 1645247.

It is an arithmetic number, because the mean of its divisors is an integer number (1401182550).

Almost surely, 2^21101311122 is an apocalyptic number.

21101311122 is an abundant number, since it is smaller than the sum of its proper divisors (23736530478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101311122 is a wasteful number, since it uses less digits than its factorization.

21101311122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277690.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21101311122 its reverse (22111310112), we get a palindrome (43212621234).

The spelling of 21101311122 in words is "twenty-one billion, one hundred one million, three hundred eleven thousand, one hundred twenty-two".