22221121012 has 6 divisors (see below), whose sum is σ = 38886961778. Its totient is φ = 11110560504.

The previous prime is 22221120983. The next prime is 22221121033. The reversal of 22221121012 is 21012112222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19769484816 + 2451636196 = 140604^2 + 49514^2 .

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, 2777640123 + ... + 2777640130.

Almost surely, 2^22221121012 is an apocalyptic number.

It is an amenable number.

22221121012 is a deficient number, since it is larger than the sum of its proper divisors (16665840766).

22221121012 is a wasteful number, since it uses less digits than its factorization.

22221121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555280257 (or 5555280255 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221121012 its reverse (21012112222), we get a palindrome (43233233234).

The spelling of 22221121012 in words is "twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".