111561016243 has 2 divisors, whose sum is σ = 111561016244. Its totient is φ = 111561016242.

The previous prime is 111561016213. The next prime is 111561016271. The reversal of 111561016243 is 342610165111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111561016243 - 2⁵ = 111561016211 is a prime.

It is not a weakly prime, because it can be changed into another prime (111561016213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55780508121 + 55780508122.

It is an arithmetic number, because the mean of its divisors is an integer number (55780508122).

Almost surely, 2^111561016243 is an apocalyptic number.

111561016243 is a deficient number, since it is larger than the sum of its proper divisors (1).

111561016243 is an equidigital number, since it uses as much as digits as its factorization.

111561016243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 111561016243 in words is "one hundred eleven billion, five hundred sixty-one million, sixteen thousand, two hundred forty-three".