20113221223312 has 160 divisors (see below), whose sum is σ = 46485173329920. Its totient is φ = 8248244981760.

The previous prime is 20113221223301. The next prime is 20113221223327. The reversal of 20113221223312 is 21332212231102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388132828 + ... + 388184644.

It is an arithmetic number, because the mean of its divisors is an integer number (290532333312).

Almost surely, 2^{20113221223312} 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 20113221223312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23242586664960).

20113221223312 is an abundant number, since it is smaller than the sum of its proper divisors (26371952106608).

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

20113221223312 is a wasteful number, since it uses less digits than its factorization.

20113221223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52929 (or 52923 counting only the distinct ones).

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

Adding to 20113221223312 its reverse (21332212231102), we get a palindrome (41445433454414).

The spelling of 20113221223312 in words is "twenty trillion, one hundred thirteen billion, two hundred twenty-one million, two hundred twenty-three thousand, three hundred twelve".