22221012012 has 48 divisors (see below), whose sum is σ = 55060978560. Its totient is φ = 6955054848.

The previous prime is 22221011987. The next prime is 22221012013. The reversal of 22221012012 is 21021012222.

It is a junction number, because it is equal to n+sod(n) for n = 22221011982 and 22221012000.

It is not an unprimeable number, because it can be changed into a prime (22221012013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405478 + ... + 457005.

It is an arithmetic number, because the mean of its divisors is an integer number (1147103720).

Almost surely, 2^22221012012 is an apocalyptic number.

It is an amenable number.

22221012012 is an abundant number, since it is smaller than the sum of its proper divisors (32839966548).

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

22221012012 is a wasteful number, since it uses less digits than its factorization.

22221012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862622 (or 862620 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22221012012 its reverse (21021012222), we get a palindrome (43242024234).

The spelling of 22221012012 in words is "twenty-two billion, two hundred twenty-one million, twelve thousand, twelve".