111002112161 has 2 divisors, whose sum is σ = 111002112162. Its totient is φ = 111002112160.

The previous prime is 111002112043. The next prime is 111002112191. The reversal of 111002112161 is 161211200111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81818881600 + 29183230561 = 286040^2 + 170831^2 .

It is a cyclic number.

It is not a de Polignac number, because 111002112161 - 2²² = 110997917857 is a prime.

It is not a weakly prime, because it can be changed into another prime (111002112191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55501056080 + 55501056081.

It is an arithmetic number, because the mean of its divisors is an integer number (55501056081).

Almost surely, 2^111002112161 is an apocalyptic number.

It is an amenable number.

111002112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111002112161 is an equidigital number, since it uses as much as digits as its factorization.

111002112161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 111002112161 its reverse (161211200111), we get a palindrome (272213312272).

The spelling of 111002112161 in words is "one hundred eleven billion, two million, one hundred twelve thousand, one hundred sixty-one".