111555502321 has 4 divisors (see below), whose sum is σ = 115154066944. Its totient is φ = 107956937700.

The previous prime is 111555502297. The next prime is 111555502327. The reversal of 111555502321 is 123205555111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111555502321 - 2²⁷ = 111421284593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3598564591 = 111555502321 / (1 + 1 + 1 + 5 + 5 + 5 + 5 + 0 + 2 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111555502327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1799282265 + ... + 1799282326.

It is an arithmetic number, because the mean of its divisors is an integer number (28788516736).

Almost surely, 2^111555502321 is an apocalyptic number.

It is an amenable number.

111555502321 is a deficient number, since it is larger than the sum of its proper divisors (3598564623).

111555502321 is an equidigital number, since it uses as much as digits as its factorization.

111555502321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598564622.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 111555502321 in words is "one hundred eleven billion, five hundred fifty-five million, five hundred two thousand, three hundred twenty-one".