111281971393 has 8 divisors (see below), whose sum is σ = 115512785280. Its totient is φ = 107128787280.

The previous prime is 111281971327. The next prime is 111281971417. The reversal of 111281971393 is 393179182111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111281971393 - 2⁹ = 111281970881 is a prime.

It is a super-2 number, since 2×111281971393² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111281971693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19404523 + ... + 19410256.

It is an arithmetic number, because the mean of its divisors is an integer number (14439098160).

Almost surely, 2^111281971393 is an apocalyptic number.

It is an amenable number.

111281971393 is a deficient number, since it is larger than the sum of its proper divisors (4230813887).

111281971393 is an equidigital number, since it uses as much as digits as its factorization.

111281971393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38814887.

The product of its digits is 81648, while the sum is 46.

The spelling of 111281971393 in words is "one hundred eleven billion, two hundred eighty-one million, nine hundred seventy-one thousand, three hundred ninety-three".