113231420021 has 4 divisors (see below), whose sum is σ = 113238356352. Its totient is φ = 113224483692.

The previous prime is 113231420017. The next prime is 113231420033. The reversal of 113231420021 is 120024132311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120024132311 = 2477 ⋅48455443.

It is a cyclic number.

It is not a de Polignac number, because 113231420021 - 2² = 113231420017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113231419975 and 113231420002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113231420051) 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, 3443621 + ... + 3476346.

It is an arithmetic number, because the mean of its divisors is an integer number (28309589088).

Almost surely, 2^113231420021 is an apocalyptic number.

It is an amenable number.

113231420021 is a deficient number, since it is larger than the sum of its proper divisors (6936331).

113231420021 is an equidigital number, since it uses as much as digits as its factorization.

113231420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936330.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 113231420021 its reverse (120024132311), we get a palindrome (233255552332).

The spelling of 113231420021 in words is "one hundred thirteen billion, two hundred thirty-one million, four hundred twenty thousand, twenty-one".