311001213091 has 2 divisors, whose sum is σ = 311001213092. Its totient is φ = 311001213090.

The previous prime is 311001213077. The next prime is 311001213109. The reversal of 311001213091 is 190312100113.

Together with next prime (311001213109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311001213091 is a prime.

It is not a weakly prime, because it can be changed into another prime (311001913091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155500606545 + 155500606546.

It is an arithmetic number, because the mean of its divisors is an integer number (155500606546).

Almost surely, 2^311001213091 is an apocalyptic number.

311001213091 is a deficient number, since it is larger than the sum of its proper divisors (1).

311001213091 is an equidigital number, since it uses as much as digits as its factorization.

311001213091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 311001213091 in words is "three hundred eleven billion, one million, two hundred thirteen thousand, ninety-one".