231002130020 has 24 divisors (see below), whose sum is σ = 491749742904. Its totient is φ = 91135086336.

The previous prime is 231002129983. The next prime is 231002130031. The reversal of 231002130020 is 20031200132.

It is a happy number.

231002130020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26719825444 + 204282304576 = 163462^2 + 451976^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231002129977 and 231002130004.

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, 79108859 + ... + 79111778.

It is an arithmetic number, because the mean of its divisors is an integer number (20489572621).

Almost surely, 2^231002130020 is an apocalyptic number.

231002130020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231002130020 is an abundant number, since it is smaller than the sum of its proper divisors (260747612884).

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

231002130020 is a wasteful number, since it uses less digits than its factorization.

231002130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158220719 (or 158220717 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 231002130020 its reverse (20031200132), we get a palindrome (251033330152).

The spelling of 231002130020 in words is "two hundred thirty-one billion, two million, one hundred thirty thousand, twenty".