311222099 has 2 divisors, whose sum is σ = 311222100. Its totient is φ = 311222098.

The previous prime is 311222081. The next prime is 311222101. The reversal of 311222099 is 990222113.

It is a strong prime.

It is an emirp because it is prime and its reverse (990222113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311222099 - 2²⁸ = 42786643 is a prime.

Together with 311222101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311222399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611049 + 155611050.

It is an arithmetic number, because the mean of its divisors is an integer number (155611050).

Almost surely, 2^311222099 is an apocalyptic number.

311222099 is a deficient number, since it is larger than the sum of its proper divisors (1).

311222099 is an equidigital number, since it uses as much as digits as its factorization.

311222099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 311222099 is about 17641.4880041339. The cubic root of 311222099 is about 677.6781385485.

The spelling of 311222099 in words is "three hundred eleven million, two hundred twenty-two thousand, ninety-nine".