111022111997 has 2 divisors, whose sum is σ = 111022111998. Its totient is φ = 111022111996.

The previous prime is 111022111987. The next prime is 111022111999. The reversal of 111022111997 is 799111220111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62174923801 + 48847188196 = 249349^2 + 221014^2 .

It is a cyclic number.

It is not a de Polignac number, because 111022111997 - 2⁶ = 111022111933 is a prime.

It is a super-2 number, since 2×111022111997² (a number of 23 digits) contains 22 as substring.

Together with 111022111999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111022111999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55511055998 + 55511055999.

It is an arithmetic number, because the mean of its divisors is an integer number (55511055999).

Almost surely, 2^111022111997 is an apocalyptic number.

It is an amenable number.

111022111997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111022111997 is an equidigital number, since it uses as much as digits as its factorization.

111022111997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 35.

The spelling of 111022111997 in words is "one hundred eleven billion, twenty-two million, one hundred eleven thousand, nine hundred ninety-seven".