21120344022 has 32 divisors (see below), whose sum is σ = 43301744640. Its totient is φ = 6863516480.

The previous prime is 21120343963. The next prime is 21120344057. The reversal of 21120344022 is 22044302112.

It is a super-2 number, since 2×21120344022² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21120344022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324163 + ... + 383825.

It is an arithmetic number, because the mean of its divisors is an integer number (1353179520).

Almost surely, 2^21120344022 is an apocalyptic number.

21120344022 is an abundant number, since it is smaller than the sum of its proper divisors (22181400618).

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

21120344022 is a wasteful number, since it uses less digits than its factorization.

21120344022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61148.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21120344022 its reverse (22044302112), we get a palindrome (43164646134).

The spelling of 21120344022 in words is "twenty-one billion, one hundred twenty million, three hundred forty-four thousand, twenty-two".