311212020311 has 2 divisors, whose sum is σ = 311212020312. Its totient is φ = 311212020310.

The previous prime is 311212020281. The next prime is 311212020319. The reversal of 311212020311 is 113020212113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311212020311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311212020311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311212020319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155606010155 + 155606010156.

It is an arithmetic number, because the mean of its divisors is an integer number (155606010156).

Almost surely, 2^311212020311 is an apocalyptic number.

311212020311 is a deficient number, since it is larger than the sum of its proper divisors (1).

311212020311 is an equidigital number, since it uses as much as digits as its factorization.

311212020311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 311212020311 its reverse (113020212113), we get a palindrome (424232232424).

The spelling of 311212020311 in words is "three hundred eleven billion, two hundred twelve million, twenty thousand, three hundred eleven".