21122337120 has 96 divisors (see below), whose sum is σ = 66826257120. Its totient is φ = 5607997440.

The previous prime is 21122337113. The next prime is 21122337127. The reversal of 21122337120 is 2173322112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21122337113) and next prime (21122337127).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122337127) 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, 13840 + ... + 206000.

It is an arithmetic number, because the mean of its divisors is an integer number (696106845).

Almost surely, 2^21122337120 is an apocalyptic number.

21122337120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122337120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33413128560).

21122337120 is an abundant number, since it is smaller than the sum of its proper divisors (45703920000).

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

21122337120 is a wasteful number, since it uses less digits than its factorization.

21122337120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192408 (or 192400 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

Adding to 21122337120 its reverse (2173322112), we get a palindrome (23295659232).

The spelling of 21122337120 in words is "twenty-one billion, one hundred twenty-two million, three hundred thirty-seven thousand, one hundred twenty".