312221110213 has 2 divisors, whose sum is σ = 312221110214. Its totient is φ = 312221110212.

The previous prime is 312221110183. The next prime is 312221110231. The reversal of 312221110213 is 312011122213.

Together with next prime (312221110231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179668320129 + 132552790084 = 423873^2 + 364078^2 .

It is a cyclic number.

It is not a de Polignac number, because 312221110213 - 2¹⁷ = 312220979141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312221110913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110555106 + 156110555107.

It is an arithmetic number, because the mean of its divisors is an integer number (156110555107).

Almost surely, 2^312221110213 is an apocalyptic number.

It is an amenable number.

312221110213 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221110213 is an equidigital number, since it uses as much as digits as its factorization.

312221110213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312221110213 its reverse (312011122213), we get a palindrome (624232232426).

The spelling of 312221110213 in words is "three hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, two hundred thirteen".