22121023213 has 2 divisors, whose sum is σ = 22121023214. Its totient is φ = 22121023212.

The previous prime is 22121023181. The next prime is 22121023217. The reversal of 22121023213 is 31232012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19314884484 + 2806138729 = 138978^2 + 52973^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121023213 - 2⁵ = 22121023181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121023217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060511606 + 11060511607.

It is an arithmetic number, because the mean of its divisors is an integer number (11060511607).

Almost surely, 2^22121023213 is an apocalyptic number.

It is an amenable number.

22121023213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121023213 is an equidigital number, since it uses as much as digits as its factorization.

22121023213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22121023213 its reverse (31232012122), we get a palindrome (53353035335).

The spelling of 22121023213 in words is "twenty-two billion, one hundred twenty-one million, twenty-three thousand, two hundred thirteen".