111123456779 has 2 divisors, whose sum is σ = 111123456780. Its totient is φ = 111123456778.

The previous prime is 111123456761. The next prime is 111123456781. The reversal of 111123456779 is 977654321111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111123456779 - 2³² = 106828489483 is a prime.

Together with 111123456781, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (111123458779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561728389 + 55561728390.

It is an arithmetic number, because the mean of its divisors is an integer number (55561728390).

Almost surely, 2^111123456779 is an apocalyptic number.

111123456779 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123456779 is an equidigital number, since it uses as much as digits as its factorization.

111123456779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The spelling of 111123456779 in words is "one hundred eleven billion, one hundred twenty-three million, four hundred fifty-six thousand, seven hundred seventy-nine".