111018907997 has 2 divisors, whose sum is σ = 111018907998. Its totient is φ = 111018907996.

The previous prime is 111018907969. The next prime is 111018908047. The reversal of 111018907997 is 799709810111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102905582521 + 8113325476 = 320789^2 + 90074^2 .

It is a cyclic number.

It is not a de Polignac number, because 111018907997 - 2¹² = 111018903901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111018907297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55509453998 + 55509453999.

It is an arithmetic number, because the mean of its divisors is an integer number (55509453999).

Almost surely, 2^111018907997 is an apocalyptic number.

It is an amenable number.

111018907997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111018907997 is an equidigital number, since it uses as much as digits as its factorization.

111018907997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 53.

The spelling of 111018907997 in words is "one hundred eleven billion, eighteen million, nine hundred seven thousand, nine hundred ninety-seven".