222131231213 has 2 divisors, whose sum is σ = 222131231214. Its totient is φ = 222131231212.

The previous prime is 222131231207. The next prime is 222131231233. The reversal of 222131231213 is 312132131222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150514513444 + 71616717769 = 387962^2 + 267613^2 .

It is a cyclic number.

It is not a de Polignac number, because 222131231213 - 2⁸ = 222131230957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222131231233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111065615606 + 111065615607.

It is an arithmetic number, because the mean of its divisors is an integer number (111065615607).

Almost surely, 2^222131231213 is an apocalyptic number.

It is an amenable number.

222131231213 is a deficient number, since it is larger than the sum of its proper divisors (1).

222131231213 is an equidigital number, since it uses as much as digits as its factorization.

222131231213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

Adding to 222131231213 its reverse (312132131222), we get a palindrome (534263362435).

Subtracting 222131231213 from its reverse (312132131222), we obtain a palindrome (90000900009).

The spelling of 222131231213 in words is "two hundred twenty-two billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred thirteen".