113240410021 has 4 divisors (see below), whose sum is σ = 113241280972. Its totient is φ = 113239539072.

The previous prime is 113240410009. The next prime is 113240410027. The reversal of 113240410021 is 120014042311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120014042311 = 83 ⋅1445952317.

It can be written as a sum of positive squares in 2 ways, for example, as 100270389025 + 12970020996 = 316655^2 + 113886^2 .

It is a cyclic number.

It is not a de Polignac number, because 113240410021 - 2⁹ = 113240409509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113240410027) 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, 196866 + ... + 515011.

It is an arithmetic number, because the mean of its divisors is an integer number (28310320243).

Almost surely, 2^113240410021 is an apocalyptic number.

It is an amenable number.

113240410021 is a deficient number, since it is larger than the sum of its proper divisors (870951).

113240410021 is an equidigital number, since it uses as much as digits as its factorization.

113240410021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870950.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 113240410021 its reverse (120014042311), we get a palindrome (233254452332).

The spelling of 113240410021 in words is "one hundred thirteen billion, two hundred forty million, four hundred ten thousand, twenty-one".