21122413032 has 256 divisors, whose sum is σ = 64749404160. Its totient is φ = 5612200704.

The previous prime is 21122413019. The next prime is 21122413049. The reversal of 21122413032 is 23031422112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21487213 + ... + 21488195.

It is an arithmetic number, because the mean of its divisors is an integer number (252927360).

Almost surely, 2^21122413032 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 21122413032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32374702080).

21122413032 is an abundant number, since it is smaller than the sum of its proper divisors (43626991128).

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

21122413032 is a wasteful number, since it uses less digits than its factorization.

21122413032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21122413032 its reverse (23031422112), we get a palindrome (44153835144).

The spelling of 21122413032 in words is "twenty-one billion, one hundred twenty-two million, four hundred thirteen thousand, thirty-two".