22001012224 has 40 divisors (see below), whose sum is σ = 45147175128. Its totient is φ = 10703185920.

The previous prime is 22001012219. The next prime is 22001012251. The reversal of 22001012224 is 42221010022.

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

It is a junction number, because it is equal to n+sod(n) for n = 22001012198 and 22001012207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561742 + ... + 599629.

Almost surely, 2^22001012224 is an apocalyptic number.

It is an amenable number.

22001012224 is an abundant number, since it is smaller than the sum of its proper divisors (23146162904).

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

22001012224 is an equidigital number, since it uses as much as digits as its factorization.

22001012224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161426 (or 1161410 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22001012224 its reverse (42221010022), we get a palindrome (64222022246).

The spelling of 22001012224 in words is "twenty-two billion, one million, twelve thousand, two hundred twenty-four".