113203421 has 2 divisors, whose sum is σ = 113203422. Its totient is φ = 113203420.

The previous prime is 113203417. The next prime is 113203423. The reversal of 113203421 is 124302311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75516100 + 37687321 = 8690^2 + 6139^2 .

It is a cyclic number.

It is not a de Polignac number, because 113203421 - 2² = 113203417 is a prime.

It is a super-2 number, since 2×113203421² = 25630029052206482, which contains 22 as substring.

Together with 113203423, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113203421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113203423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56601710 + 56601711.

It is an arithmetic number, because the mean of its divisors is an integer number (56601711).

Almost surely, 2^113203421 is an apocalyptic number.

It is an amenable number.

113203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

113203421 is an equidigital number, since it uses as much as digits as its factorization.

113203421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 113203421 is about 10639.7096294965. The cubic root of 113203421 is about 483.7487440403.

Adding to 113203421 its reverse (124302311), we get a palindrome (237505732).

It can be divided in two parts, 11320 and 3421, that added together give a palindrome (14741).

The spelling of 113203421 in words is "one hundred thirteen million, two hundred three thousand, four hundred twenty-one".