111312100021013 has 4 divisors (see below), whose sum is σ = 111326868782700. Its totient is φ = 111297331259328.

The previous prime is 111312100020983. The next prime is 111312100021027. The reversal of 111312100021013 is 310120001213111.

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 15422216514769 + 95889883506244 = 3927113^2 + 9792338^2 .

It is a cyclic number.

It is not a de Polignac number, because 111312100021013 - 2⁶ = 111312100020949 is a prime.

It is a super-2 number, since 2×111312100021013² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111312100020982 and 111312100021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111312100021813) 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, 7384369538 + ... + 7384384611.

It is an arithmetic number, because the mean of its divisors is an integer number (27831717195675).

Almost surely, 2^{111312100021013} is an apocalyptic number.

It is an amenable number.

111312100021013 is a deficient number, since it is larger than the sum of its proper divisors (14768761687).

111312100021013 is an equidigital number, since it uses as much as digits as its factorization.

111312100021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14768761686.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111312100021013 its reverse (310120001213111), we get a palindrome (421432101234124).

The spelling of 111312100021013 in words is "one hundred eleven trillion, three hundred twelve billion, one hundred million, twenty-one thousand, thirteen".