22100221312 has 64 divisors (see below), whose sum is σ = 47689230960. Its totient is φ = 10141009920.

The previous prime is 22100221309. The next prime is 22100221321. The reversal of 22100221312 is 21312200122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249487 + ... + 326257.

Almost surely, 2^22100221312 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 22100221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23844615480).

22100221312 is an abundant number, since it is smaller than the sum of its proper divisors (25589009648).

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

22100221312 is a wasteful number, since it uses less digits than its factorization.

22100221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76971 (or 76959 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22100221312 its reverse (21312200122), we get a palindrome (43412421434).

The spelling of 22100221312 in words is "twenty-two billion, one hundred million, two hundred twenty-one thousand, three hundred twelve".