22012311213 has 6 divisors (see below), whose sum is σ = 31795560654. Its totient is φ = 14674874136.

The previous prime is 22012311193. The next prime is 22012311241. The reversal of 22012311213 is 31211321022.

22012311213 is a `hidden beast` number, since 220 + 1 + 231 + 1 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21504169449 + 508141764 = 146643^2 + 22542^2 .

It is not a de Polignac number, because 22012311213 - 2⁶ = 22012311149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012311313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222906170 + ... + 1222906187.

It is an arithmetic number, because the mean of its divisors is an integer number (5299260109).

Almost surely, 2^22012311213 is an apocalyptic number.

It is an amenable number.

22012311213 is a deficient number, since it is larger than the sum of its proper divisors (9783249441).

22012311213 is a wasteful number, since it uses less digits than its factorization.

22012311213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445812363 (or 2445812360 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22012311213 its reverse (31211321022), we get a palindrome (53223632235).

The spelling of 22012311213 in words is "twenty-two billion, twelve million, three hundred eleven thousand, two hundred thirteen".