11123111977 has 2 divisors, whose sum is σ = 11123111978. Its totient is φ = 11123111976.

The previous prime is 11123111971. The next prime is 11123112017. The reversal of 11123111977 is 77911132111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10794378816 + 328733161 = 103896^2 + 18131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123111977 is a prime.

It is not a weakly prime, because it can be changed into another prime (11123111971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561555988 + 5561555989.

It is an arithmetic number, because the mean of its divisors is an integer number (5561555989).

Almost surely, 2^11123111977 is an apocalyptic number.

It is an amenable number.

11123111977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123111977 is an equidigital number, since it uses as much as digits as its factorization.

11123111977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 34.

The spelling of 11123111977 in words is "eleven billion, one hundred twenty-three million, one hundred eleven thousand, nine hundred seventy-seven".