113231243020421 has 4 divisors (see below), whose sum is σ = 118154340543072. Its totient is φ = 108308145497772.

The previous prime is 113231243020417. The next prime is 113231243020457. The reversal of 113231243020421 is 124020342132311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113231243020421 - 2² = 113231243020417 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 (113231243050421) 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, 2461548761291 + ... + 2461548761336.

It is an arithmetic number, because the mean of its divisors is an integer number (29538585135768).

Almost surely, 2^{113231243020421} is an apocalyptic number.

It is an amenable number.

113231243020421 is a deficient number, since it is larger than the sum of its proper divisors (4923097522651).

113231243020421 is an equidigital number, since it uses as much as digits as its factorization.

113231243020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923097522650.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 113231243020421 its reverse (124020342132311), we get a palindrome (237251585152732).

The spelling of 113231243020421 in words is "one hundred thirteen trillion, two hundred thirty-one billion, two hundred forty-three million, twenty thousand, four hundred twenty-one".