21122130232 has 64 divisors (see below), whose sum is σ = 45952358400. Its totient is φ = 8914510080.

The previous prime is 21122130229. The next prime is 21122130277. The reversal of 21122130232 is 23203122112.

It is a super-2 number, since 2×21122130232² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4128508 + ... + 4133620.

It is an arithmetic number, because the mean of its divisors is an integer number (718005600).

Almost surely, 2^21122130232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122130232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22976179200).

21122130232 is an abundant number, since it is smaller than the sum of its proper divisors (24830228168).

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

21122130232 is a wasteful number, since it uses less digits than its factorization.

21122130232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236 (or 6232 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21122130232 its reverse (23203122112), we get a palindrome (44325252344).

The spelling of 21122130232 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirty thousand, two hundred thirty-two".