113122430021 has 4 divisors (see below), whose sum is σ = 117023203500. Its totient is φ = 109221656544.

The previous prime is 113122429997. The next prime is 113122430051. The reversal of 113122430021 is 120034221311.

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 76369322500 + 36753107521 = 276350^2 + 191711^2 .

It is a cyclic number.

It is not a de Polignac number, because 113122430021 - 2²² = 113118235717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113122429975 and 113122430002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113122430051) 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, 1950386696 + ... + 1950386753.

It is an arithmetic number, because the mean of its divisors is an integer number (29255800875).

Almost surely, 2^113122430021 is an apocalyptic number.

It is an amenable number.

113122430021 is a deficient number, since it is larger than the sum of its proper divisors (3900773479).

113122430021 is an equidigital number, since it uses as much as digits as its factorization.

113122430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900773478.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 113122430021 its reverse (120034221311), we get a palindrome (233156651332).

The spelling of 113122430021 in words is "one hundred thirteen billion, one hundred twenty-two million, four hundred thirty thousand, twenty-one".