22121303121232 has 80 divisors (see below), whose sum is σ = 50033044108800. Its totient is φ = 9277366247424.

The previous prime is 22121303121223. The next prime is 22121303121251. The reversal of 22121303121232 is 23212130312122.

It is a junction number, because it is equal to n+sod(n) for n = 22121303121197 and 22121303121206.

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, 33026394 + ... + 33689542.

It is an arithmetic number, because the mean of its divisors is an integer number (625413051360).

Almost surely, 2^{22121303121232} 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 22121303121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25016522054400).

22121303121232 is an abundant number, since it is smaller than the sum of its proper divisors (27911740987568).

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

22121303121232 is a wasteful number, since it uses less digits than its factorization.

22121303121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669548 (or 669542 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 22121303121232 its reverse (23212130312122), we get a palindrome (45333433433354).

The spelling of 22121303121232 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred three million, one hundred twenty-one thousand, two hundred thirty-two".