111779556211 has 2 divisors, whose sum is σ = 111779556212. Its totient is φ = 111779556210.

The previous prime is 111779556151. The next prime is 111779556233. The reversal of 111779556211 is 112655977111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111779556211 is a prime.

It is not a weakly prime, because it can be changed into another prime (111779556271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55889778105 + 55889778106.

It is an arithmetic number, because the mean of its divisors is an integer number (55889778106).

Almost surely, 2^111779556211 is an apocalyptic number.

111779556211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111779556211 is an equidigital number, since it uses as much as digits as its factorization.

111779556211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 46.

The spelling of 111779556211 in words is "one hundred eleven billion, seven hundred seventy-nine million, five hundred fifty-six thousand, two hundred eleven".