113001021 has 16 divisors (see below), whose sum is σ = 191324800. Its totient is φ = 64571904.

The previous prime is 113001011. The next prime is 113001029. The reversal of 113001021 is 120100311.

It is not a de Polignac number, because 113001021 - 2⁹ = 113000509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113000994 and 113001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113001029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298756 + ... + 299133.

It is an arithmetic number, because the mean of its divisors is an integer number (11957800).

Almost surely, 2^113001021 is an apocalyptic number.

It is an amenable number.

113001021 is a deficient number, since it is larger than the sum of its proper divisors (78323779).

113001021 is an equidigital number, since it uses as much as digits as its factorization.

113001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597905 (or 597899 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 113001021 is about 10630.1938364265. The cubic root of 113001021 is about 483.4602687877.

Adding to 113001021 its reverse (120100311), we get a palindrome (233101332).

It can be divided in two parts, 11300 and 1021, that added together give a palindrome (12321).

The spelling of 113001021 in words is "one hundred thirteen million, one thousand, twenty-one".