22031311213 has 2 divisors, whose sum is σ = 22031311214. Its totient is φ = 22031311212.

The previous prime is 22031311187. The next prime is 22031311249. The reversal of 22031311213 is 31211313022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21955237929 + 76073284 = 148173^2 + 8722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22031311213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031311613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015655606 + 11015655607.

It is an arithmetic number, because the mean of its divisors is an integer number (11015655607).

Almost surely, 2^22031311213 is an apocalyptic number.

It is an amenable number.

22031311213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031311213 is an equidigital number, since it uses as much as digits as its factorization.

22031311213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 22031311213 its reverse (31211313022), we get a palindrome (53242624235).

The spelling of 22031311213 in words is "twenty-two billion, thirty-one million, three hundred eleven thousand, two hundred thirteen".