233131122020 has 48 divisors (see below), whose sum is σ = 513814371840. Its totient is φ = 88682368896.

The previous prime is 233131121999. The next prime is 233131122023. The reversal of 233131122020 is 20221131332.

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 = 233131121983 and 233131122001.

It is not an unprimeable number, because it can be changed into a prime (233131122023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385180 + ... + 1544339.

It is an arithmetic number, because the mean of its divisors is an integer number (10704466080).

Almost surely, 2^233131122020 is an apocalyptic number.

233131122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233131122020 is an abundant number, since it is smaller than the sum of its proper divisors (280683249820).

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

233131122020 is a wasteful number, since it uses less digits than its factorization.

233131122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929724 (or 2929722 counting only the distinct ones).

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

Adding to 233131122020 its reverse (20221131332), we get a palindrome (253352253352).

The spelling of 233131122020 in words is "two hundred thirty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, twenty".