21120110022 has 32 divisors (see below), whose sum is σ = 48505518720. Its totient is φ = 6063189120.

The previous prime is 21120110009. The next prime is 21120110027. The reversal of 21120110022 is 22001102112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120110027) 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, 8419843 + ... + 8422350.

It is an arithmetic number, because the mean of its divisors is an integer number (1515797460).

Almost surely, 2^21120110022 is an apocalyptic number.

21120110022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120110022 is an abundant number, since it is smaller than the sum of its proper divisors (27385408698).

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

21120110022 is a wasteful number, since it uses less digits than its factorization.

21120110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16842228.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21120110022 its reverse (22001102112), we get a palindrome (43121212134).

The spelling of 21120110022 in words is "twenty-one billion, one hundred twenty million, one hundred ten thousand, twenty-two".