311102050661 has 2 divisors, whose sum is σ = 311102050662. Its totient is φ = 311102050660.

The previous prime is 311102050627. The next prime is 311102050669. The reversal of 311102050661 is 166050201113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306367785025 + 4734265636 = 553505^2 + 68806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311102050661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311102050661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311102050669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155551025330 + 155551025331.

It is an arithmetic number, because the mean of its divisors is an integer number (155551025331).

Almost surely, 2^311102050661 is an apocalyptic number.

It is an amenable number.

311102050661 is a deficient number, since it is larger than the sum of its proper divisors (1).

311102050661 is an equidigital number, since it uses as much as digits as its factorization.

311102050661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

Adding to 311102050661 its reverse (166050201113), we get a palindrome (477152251774).

The spelling of 311102050661 in words is "three hundred eleven billion, one hundred two million, fifty thousand, six hundred sixty-one".