312221213111 has 2 divisors, whose sum is σ = 312221213112. Its totient is φ = 312221213110.

The previous prime is 312221213089. The next prime is 312221213153. The reversal of 312221213111 is 111312122213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312221213111 - 2²⁶ = 312154104247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312221213411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110606555 + 156110606556.

It is an arithmetic number, because the mean of its divisors is an integer number (156110606556).

Almost surely, 2^312221213111 is an apocalyptic number.

312221213111 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221213111 is an equidigital number, since it uses as much as digits as its factorization.

312221213111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

Adding to 312221213111 its reverse (111312122213), we get a palindrome (423533335324).

The spelling of 312221213111 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred eleven".