311201022149 has 2 divisors, whose sum is σ = 311201022150. Its totient is φ = 311201022148.

The previous prime is 311201022131. The next prime is 311201022179. The reversal of 311201022149 is 941220102113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230952330625 + 80248691524 = 480575^2 + 283282^2 .

It is a cyclic number.

It is not a de Polignac number, because 311201022149 - 2⁸ = 311201021893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311201022179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155600511074 + 155600511075.

It is an arithmetic number, because the mean of its divisors is an integer number (155600511075).

Almost surely, 2^311201022149 is an apocalyptic number.

It is an amenable number.

311201022149 is a deficient number, since it is larger than the sum of its proper divisors (1).

311201022149 is an equidigital number, since it uses as much as digits as its factorization.

311201022149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 311201022149 in words is "three hundred eleven billion, two hundred one million, twenty-two thousand, one hundred forty-nine".