311112101 has 2 divisors, whose sum is σ = 311112102. Its totient is φ = 311112100.

The previous prime is 311112091. The next prime is 311112119. The reversal of 311112101 is 101211113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231009601 + 80102500 = 15199^2 + 8950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311112101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311112701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155556050 + 155556051.

It is an arithmetic number, because the mean of its divisors is an integer number (155556051).

Almost surely, 2^311112101 is an apocalyptic number.

It is an amenable number.

311112101 is a deficient number, since it is larger than the sum of its proper divisors (1).

311112101 is an equidigital number, since it uses as much as digits as its factorization.

311112101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 311112101 is about 17638.3701344540. The cubic root of 311112101 is about 677.5982898659.

Adding to 311112101 its reverse (101211113), we get a palindrome (412323214).

The spelling of 311112101 in words is "three hundred eleven million, one hundred twelve thousand, one hundred one".