113231421020 has 24 divisors (see below), whose sum is σ = 237793697568. Its totient is φ = 45291099200.

The previous prime is 113231420999. The next prime is 113231421029. The reversal of 113231421020 is 20124132311.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 113231420983 and 113231421001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113231421029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711590 + ... + 856050.

It is an arithmetic number, because the mean of its divisors is an integer number (9908070732).

Almost surely, 2^113231421020 is an apocalyptic number.

113231421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113231421020 is an abundant number, since it is smaller than the sum of its proper divisors (124562276548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

113231421020 is a wasteful number, since it uses less digits than its factorization.

113231421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183661 (or 183659 counting only the distinct ones).

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

Adding to 113231421020 its reverse (20124132311), we get a palindrome (133355553331).

The spelling of 113231421020 in words is "one hundred thirteen billion, two hundred thirty-one million, four hundred twenty-one thousand, twenty".