611111111113 has 2 divisors, whose sum is σ = 611111111114. Its totient is φ = 611111111112.

The previous prime is 611111111099. The next prime is 611111111147. The reversal of 611111111113 is 311111111116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338947524864 + 272163586249 = 582192^2 + 521693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611111111113 is a prime.

It is not a weakly prime, because it can be changed into another prime (611111111183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305555555556 + 305555555557.

It is an arithmetic number, because the mean of its divisors is an integer number (305555555557).

Almost surely, 2^611111111113 is an apocalyptic number.

It is an amenable number.

611111111113 is a deficient number, since it is larger than the sum of its proper divisors (1).

611111111113 is an equidigital number, since it uses as much as digits as its factorization.

611111111113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 19.

Adding to 611111111113 its reverse (311111111116), we get a palindrome (922222222229).

The spelling of 611111111113 in words is "six hundred eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred thirteen".