22122220312 has 8 divisors (see below), whose sum is σ = 41479163100. Its totient is φ = 11061110152.

The previous prime is 22122220301. The next prime is 22122220321. The reversal of 22122220312 is 21302222122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 22122220312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382638762 + ... + 1382638777.

Almost surely, 2^22122220312 is an apocalyptic number.

It is an amenable number.

22122220312 is a deficient number, since it is larger than the sum of its proper divisors (19356942788).

22122220312 is a wasteful number, since it uses less digits than its factorization.

22122220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765277545 (or 2765277541 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22122220312 its reverse (21302222122), we get a palindrome (43424442434).

The spelling of 22122220312 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, three hundred twelve".