111555313013 has 4 divisors (see below), whose sum is σ = 114276174348. Its totient is φ = 108834451680.

The previous prime is 111555312971. The next prime is 111555313021. The reversal of 111555313013 is 310313555111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5867253604 + 105688059409 = 76598^2 + 325097^2 .

It is a cyclic number.

It is not a de Polignac number, because 111555313013 - 2²⁸ = 111286877557 is a prime.

It is a super-2 number, since 2×111555313013² (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 (111555313213) 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, 1360430606 + ... + 1360430687.

It is an arithmetic number, because the mean of its divisors is an integer number (28569043587).

Almost surely, 2^111555313013 is an apocalyptic number.

It is an amenable number.

111555313013 is a deficient number, since it is larger than the sum of its proper divisors (2720861335).

111555313013 is an equidigital number, since it uses as much as digits as its factorization.

111555313013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720861334.

The product of its (nonzero) digits is 3375, while the sum is 29.

Adding to 111555313013 its reverse (310313555111), we get a palindrome (421868868124).

The spelling of 111555313013 in words is "one hundred eleven billion, five hundred fifty-five million, three hundred thirteen thousand, thirteen".