21300122032 has 60 divisors (see below), whose sum is σ = 48352400040. Its totient is φ = 9062903808.

The previous prime is 21300122021. The next prime is 21300122033. The reversal of 21300122032 is 23022100312.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21300121997 and 21300122015.

It is not an unprimeable number, because it can be changed into a prime (21300122033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11248 + ... + 206704.

It is an arithmetic number, because the mean of its divisors is an integer number (805873334).

Almost surely, 2^21300122032 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 21300122032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24176200020).

21300122032 is an abundant number, since it is smaller than the sum of its proper divisors (27052278008).

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

21300122032 is a wasteful number, since it uses less digits than its factorization.

21300122032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195618 (or 195605 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21300122032 its reverse (23022100312), we get a palindrome (44322222344).

The spelling of 21300122032 in words is "twenty-one billion, three hundred million, one hundred twenty-two thousand, thirty-two".