22401440212 has 12 divisors (see below), whose sum is σ = 39739541716. Its totient is φ = 11047285440.

The previous prime is 22401440197. The next prime is 22401440213. The reversal of 22401440212 is 21204410422.

It can be written as a sum of positive squares in 2 ways, for example, as 10719289156 + 11682151056 = 103534^2 + 108084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22401440213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38358339 + ... + 38358922.

Almost surely, 2^22401440212 is an apocalyptic number.

It is an amenable number.

22401440212 is a deficient number, since it is larger than the sum of its proper divisors (17338101504).

22401440212 is a wasteful number, since it uses less digits than its factorization.

22401440212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76717338 (or 76717336 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22401440212 its reverse (21204410422), we get a palindrome (43605850634).

The spelling of 22401440212 in words is "twenty-two billion, four hundred one million, four hundred forty thousand, two hundred twelve".