113102021 has 4 divisors (see below), whose sum is σ = 113144544. Its totient is φ = 113059500.

The previous prime is 113101999. The next prime is 113102047. The reversal of 113102021 is 120201311.

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: 120201311 = 997 ⋅120563.

It is a cyclic number.

It is not a de Polignac number, because 113102021 - 2⁶ = 113101957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113101993 and 113102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113102051) 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, 16985 + ... + 22686.

It is an arithmetic number, because the mean of its divisors is an integer number (28286136).

Almost surely, 2^113102021 is an apocalyptic number.

It is an amenable number.

113102021 is a deficient number, since it is larger than the sum of its proper divisors (42523).

113102021 is an equidigital number, since it uses as much as digits as its factorization.

113102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42522.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 113102021 is about 10634.9433943016. The cubic root of 113102021 is about 483.6042643790.

Adding to 113102021 its reverse (120201311), we get a palindrome (233303332).

It can be divided in two parts, 11310 and 2021, that added together give a palindrome (13331).

The spelling of 113102021 in words is "one hundred thirteen million, one hundred two thousand, twenty-one".