111261243097 has 2 divisors, whose sum is σ = 111261243098. Its totient is φ = 111261243096.

The previous prime is 111261242971. The next prime is 111261243113. The reversal of 111261243097 is 790342162111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104232768201 + 7028474896 = 322851^2 + 83836^2 .

It is a cyclic number.

It is not a de Polignac number, because 111261243097 - 2⁷ = 111261242969 is a prime.

It is not a weakly prime, because it can be changed into another prime (111261253097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55630621548 + 55630621549.

It is an arithmetic number, because the mean of its divisors is an integer number (55630621549).

Almost surely, 2^111261243097 is an apocalyptic number.

It is an amenable number.

111261243097 is a deficient number, since it is larger than the sum of its proper divisors (1).

111261243097 is an equidigital number, since it uses as much as digits as its factorization.

111261243097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 111261243097 in words is "one hundred eleven billion, two hundred sixty-one million, two hundred forty-three thousand, ninety-seven".