22112021312 has 56 divisors (see below), whose sum is σ = 46489842504. Its totient is φ = 10398892032.

The previous prime is 22112021299. The next prime is 22112021339. The reversal of 22112021312 is 21312021122.

It can be written as a sum of positive squares in 4 ways, for example, as 4001321536 + 18110699776 = 63256^2 + 134576^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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 7 ways as a sum of consecutive naturals, for example, 1927658 + ... + 1939094.

It is an arithmetic number, because the mean of its divisors is an integer number (830175759).

Almost surely, 2^22112021312 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 22112021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23244921252).

22112021312 is an abundant number, since it is smaller than the sum of its proper divisors (24377821192).

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

22112021312 is a wasteful number, since it uses less digits than its factorization.

22112021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243 (or 13233 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22112021312 its reverse (21312021122), we get a palindrome (43424042434).

The spelling of 22112021312 in words is "twenty-two billion, one hundred twelve million, twenty-one thousand, three hundred twelve".