111121219879 has 2 divisors, whose sum is σ = 111121219880. Its totient is φ = 111121219878.

The previous prime is 111121219841. The next prime is 111121220027. The reversal of 111121219879 is 978912121111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111121219879 - 2²¹ = 111119122727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121219819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560609939 + 55560609940.

It is an arithmetic number, because the mean of its divisors is an integer number (55560609940).

Almost surely, 2^111121219879 is an apocalyptic number.

111121219879 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121219879 is an equidigital number, since it uses as much as digits as its factorization.

111121219879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 43.

The spelling of 111121219879 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred nineteen thousand, eight hundred seventy-nine".