111021793 has 6 divisors (see below), whose sum is σ = 114104886. Its totient is φ = 108019872.

The previous prime is 111021787. The next prime is 111021821. The reversal of 111021793 is 397120111.

It can be written as a sum of positive squares in 3 ways, for example, as 93857344 + 17164449 = 9688^2 + 4143^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111021793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111021733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39180 + ... + 41917.

It is an arithmetic number, because the mean of its divisors is an integer number (19017481).

Almost surely, 2^111021793 is an apocalyptic number.

It is an amenable number.

111021793 is a deficient number, since it is larger than the sum of its proper divisors (3083093).

111021793 is an frugal number, since it uses more digits than its factorization.

111021793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81171 (or 81134 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 111021793 is about 10536.6879521034. The cubic root of 111021793 is about 480.6210032287.

The spelling of 111021793 in words is "one hundred eleven million, twenty-one thousand, seven hundred ninety-three".