111971604263 has 2 divisors, whose sum is σ = 111971604264. Its totient is φ = 111971604262.

The previous prime is 111971604149. The next prime is 111971604307. The reversal of 111971604263 is 362406179111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111971604263 - 2²⁰ = 111970555687 is a prime.

It is a super-2 number, since 2×111971604263² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111971604263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111971604863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55985802131 + 55985802132.

It is an arithmetic number, because the mean of its divisors is an integer number (55985802132).

Almost surely, 2^111971604263 is an apocalyptic number.

111971604263 is a deficient number, since it is larger than the sum of its proper divisors (1).

111971604263 is an equidigital number, since it uses as much as digits as its factorization.

111971604263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 111971604263 in words is "one hundred eleven billion, nine hundred seventy-one million, six hundred four thousand, two hundred sixty-three".