113312023021 has 4 divisors (see below), whose sum is σ = 113332016700. Its totient is φ = 113292029344.

The previous prime is 113312022997. The next prime is 113312023043. The reversal of 113312023021 is 120320213311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120320213311 = 1777 ⋅67709743.

It can be written as a sum of positive squares in 2 ways, for example, as 33897964996 + 79414058025 = 184114^2 + 281805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113312023021 is a prime.

It is a super-2 number, since 2×113312023021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113312023021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113312021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9988336 + ... + 9999673.

It is an arithmetic number, because the mean of its divisors is an integer number (28333004175).

Almost surely, 2^113312023021 is an apocalyptic number.

It is an amenable number.

113312023021 is a deficient number, since it is larger than the sum of its proper divisors (19993679).

113312023021 is an equidigital number, since it uses as much as digits as its factorization.

113312023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19993678.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 113312023021 its reverse (120320213311), we get a palindrome (233632236332).

The spelling of 113312023021 in words is "one hundred thirteen billion, three hundred twelve million, twenty-three thousand, twenty-one".