111222100811 has 2 divisors, whose sum is σ = 111222100812. Its totient is φ = 111222100810.

The previous prime is 111222100783. The next prime is 111222100837. The reversal of 111222100811 is 118001222111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111222100811 - 2²² = 111217906507 is a prime.

It is not a weakly prime, because it can be changed into another prime (111222100411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611050405 + 55611050406.

It is an arithmetic number, because the mean of its divisors is an integer number (55611050406).

Almost surely, 2^111222100811 is an apocalyptic number.

111222100811 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222100811 is an equidigital number, since it uses as much as digits as its factorization.

111222100811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111222100811 its reverse (118001222111), we get a palindrome (229223322922).

The spelling of 111222100811 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred thousand, eight hundred eleven".