113122021 has 4 divisors (see below), whose sum is σ = 113165344. Its totient is φ = 113078700.

The previous prime is 113122019. The next prime is 113122081. The reversal of 113122021 is 120221311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120221311 = 7 ⋅17174473.

It is a cyclic number.

It is not a de Polignac number, because 113122021 - 2¹ = 113122019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113121992 and 113122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113122001) 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, 17475 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (28291336).

Almost surely, 2^113122021 is an apocalyptic number.

It is an amenable number.

113122021 is a deficient number, since it is larger than the sum of its proper divisors (43323).

113122021 is an equidigital number, since it uses as much as digits as its factorization.

113122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43322.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 113122021 is about 10635.8836492320. The cubic root of 113122021 is about 483.6327681880.

Adding to 113122021 its reverse (120221311), we get a palindrome (233343332).

The spelling of 113122021 in words is "one hundred thirteen million, one hundred twenty-two thousand, twenty-one".