113126021 has 2 divisors, whose sum is σ = 113126022. Its totient is φ = 113126020.

The previous prime is 113125979. The next prime is 113126047. The reversal of 113126021 is 120621311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79032100 + 34093921 = 8890^2 + 5839^2 .

It is a cyclic number.

It is not a de Polignac number, because 113126021 - 2¹⁰ = 113124997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113126081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56563010 + 56563011.

It is an arithmetic number, because the mean of its divisors is an integer number (56563011).

Almost surely, 2^113126021 is an apocalyptic number.

It is an amenable number.

113126021 is a deficient number, since it is larger than the sum of its proper divisors (1).

113126021 is an equidigital number, since it uses as much as digits as its factorization.

113126021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 113126021 is about 10636.0716902435. The cubic root of 113126021 is about 483.6384685467.

Adding to 113126021 its reverse (120621311), we get a palindrome (233747332).

The spelling of 113126021 in words is "one hundred thirteen million, one hundred twenty-six thousand, twenty-one".