231230031120020 has 24 divisors (see below), whose sum is σ = 485583373648968. Its totient is φ = 92491953724800.

The previous prime is 231230031120019. The next prime is 231230031120073. The reversal of 231230031120020 is 20021130032132.

It can be written as a sum of positive squares in 4 ways, for example, as 8388310402564 + 222841720717456 = 2896258^2 + 14927884^2 .

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 = 231230031119974 and 231230031120001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43245710 + ... + 48297530.

It is an arithmetic number, because the mean of its divisors is an integer number (20232640568707).

Almost surely, 2^{231230031120020} is an apocalyptic number.

231230031120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231230031120020 is an abundant number, since it is smaller than the sum of its proper divisors (254353342528948).

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

231230031120020 is a wasteful number, since it uses less digits than its factorization.

231230031120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340411 (or 7340409 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231230031120020 its reverse (20021130032132), we get a palindrome (251251161152152).

The spelling of 231230031120020 in words is "two hundred thirty-one trillion, two hundred thirty billion, thirty-one million, one hundred twenty thousand, twenty".