111312110132021 has 4 divisors (see below), whose sum is σ = 113412338625132. Its totient is φ = 109211881638912.

The previous prime is 111312110131997. The next prime is 111312110132023. The reversal of 111312110132021 is 120231011213111.

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 69445322224996 + 41866787907025 = 8333386^2 + 6470455^2 .

It is a cyclic number.

It is not a de Polignac number, because 111312110132021 - 2³⁸ = 111037232225077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111312110131984 and 111312110132002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111312110132023) 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, 1050114246476 + ... + 1050114246581.

It is an arithmetic number, because the mean of its divisors is an integer number (28353084656283).

Almost surely, 2^{111312110132021} is an apocalyptic number.

It is an amenable number.

111312110132021 is a deficient number, since it is larger than the sum of its proper divisors (2100228493111).

111312110132021 is an equidigital number, since it uses as much as digits as its factorization.

111312110132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100228493110.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 111312110132021 its reverse (120231011213111), we get a palindrome (231543121345132).

The spelling of 111312110132021 in words is "one hundred eleven trillion, three hundred twelve billion, one hundred ten million, one hundred thirty-two thousand, twenty-one".