220312343212991 has 2 divisors, whose sum is σ = 220312343212992. Its totient is φ = 220312343212990.

The previous prime is 220312343212979. The next prime is 220312343213087. The reversal of 220312343212991 is 199212343213022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220312343212991 - 2⁴⁶ = 149943599035327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220312343211991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110156171606495 + 110156171606496.

It is an arithmetic number, because the mean of its divisors is an integer number (110156171606496).

Almost surely, 2^{220312343212991} is an apocalyptic number.

220312343212991 is a deficient number, since it is larger than the sum of its proper divisors (1).

220312343212991 is an equidigital number, since it uses as much as digits as its factorization.

220312343212991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 220312343212991 in words is "two hundred twenty trillion, three hundred twelve billion, three hundred forty-three million, two hundred twelve thousand, nine hundred ninety-one".