111203921111 has 4 divisors (see below), whose sum is σ = 111212113272. Its totient is φ = 111195728952.

The previous prime is 111203921099. The next prime is 111203921113. The reversal of 111203921111 is 111129302111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111203921111 - 2¹⁴ = 111203904727 is a prime.

It is a super-2 number, since 2×111203921111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111203921113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4075685 + ... + 4102878.

It is an arithmetic number, because the mean of its divisors is an integer number (27803028318).

Almost surely, 2^111203921111 is an apocalyptic number.

111203921111 is a deficient number, since it is larger than the sum of its proper divisors (8192161).

111203921111 is an equidigital number, since it uses as much as digits as its factorization.

111203921111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8192160.

The product of its (nonzero) digits is 108, while the sum is 23.

The spelling of 111203921111 in words is "one hundred eleven billion, two hundred three million, nine hundred twenty-one thousand, one hundred eleven".