113402021 has 8 divisors (see below), whose sum is σ = 115042200. Its totient is φ = 111771648.

The previous prime is 113402017. The next prime is 113402027. The reversal of 113402021 is 120204311.

It can be written as a sum of positive squares in 4 ways, for example, as 60621796 + 52780225 = 7786^2 + 7265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113402021 - 2² = 113402017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113401987 and 113402005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113402027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22655 + ... + 27203.

It is an arithmetic number, because the mean of its divisors is an integer number (14380275).

Almost surely, 2^113402021 is an apocalyptic number.

It is an amenable number.

113402021 is a deficient number, since it is larger than the sum of its proper divisors (1640179).

113402021 is an equidigital number, since it uses as much as digits as its factorization.

113402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 113402021 is about 10649.0385011981. The cubic root of 113402021 is about 484.0314692218.

Adding to 113402021 its reverse (120204311), we get a palindrome (233606332).

The spelling of 113402021 in words is "one hundred thirteen million, four hundred two thousand, twenty-one".