22121013213 has 24 divisors (see below), whose sum is σ = 34440063840. Its totient is φ = 13601221920.

The previous prime is 22121013203. The next prime is 22121013217. The reversal of 22121013213 is 31231012122.

It is not a de Polignac number, because 22121013213 - 2⁶ = 22121013149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121013217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56278 + ... + 217736.

It is an arithmetic number, because the mean of its divisors is an integer number (1435002660).

Almost surely, 2^22121013213 is an apocalyptic number.

It is an amenable number.

22121013213 is a deficient number, since it is larger than the sum of its proper divisors (12319050627).

22121013213 is a wasteful number, since it uses less digits than its factorization.

22121013213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162649 (or 162646 counting only the distinct ones).

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

Adding to 22121013213 its reverse (31231012122), we get a palindrome (53352025335).

It can be divided in two parts, 22121013 and 213, that added together give a triangular number (22121226 = T₆₆₅₁).

The spelling of 22121013213 in words is "twenty-two billion, one hundred twenty-one million, thirteen thousand, two hundred thirteen".