113143021 has 4 divisors (see below), whose sum is σ = 113220000. Its totient is φ = 113066044.

The previous prime is 113142961. The next prime is 113143033. The reversal of 113143021 is 120341311.

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.

It is a cyclic number.

It is not a de Polignac number, because 113143021 - 2⁷ = 113142893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113142986 and 113143004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113143091) 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, 36241 + ... + 39238.

It is an arithmetic number, because the mean of its divisors is an integer number (28305000).

Almost surely, 2^113143021 is an apocalyptic number.

It is an amenable number.

113143021 is a deficient number, since it is larger than the sum of its proper divisors (76979).

113143021 is an equidigital number, since it uses as much as digits as its factorization.

113143021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76978.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 113143021 is about 10636.8708274567. The cubic root of 113143021 is about 483.6626935719.

Adding to 113143021 its reverse (120341311), we get a palindrome (233484332).

The spelling of 113143021 in words is "one hundred thirteen million, one hundred forty-three thousand, twenty-one".