111102021997 has 2 divisors, whose sum is σ = 111102021998. Its totient is φ = 111102021996.

The previous prime is 111102021967. The next prime is 111102022049. The reversal of 111102021997 is 799120201111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110981593321 + 120428676 = 333139^2 + 10974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111102021997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111102021967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551010998 + 55551010999.

It is an arithmetic number, because the mean of its divisors is an integer number (55551010999).

Almost surely, 2^111102021997 is an apocalyptic number.

It is an amenable number.

111102021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102021997 is an equidigital number, since it uses as much as digits as its factorization.

111102021997 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 34.

The spelling of 111102021997 in words is "one hundred eleven billion, one hundred two million, twenty-one thousand, nine hundred ninety-seven".