231232221230020 has 48 divisors (see below), whose sum is σ = 486346185179568. Its totient is φ = 92348417064960.

The previous prime is 231232221229981. The next prime is 231232221230063. The reversal of 231232221230020 is 20032122232132.

It can be written as a sum of positive squares in 8 ways, for example, as 25424103541824 + 205808117688196 = 5042232^2 + 14346014^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455501140 + ... + 456008500.

It is an arithmetic number, because the mean of its divisors is an integer number (10132212191241).

Almost surely, 2^{231232221230020} is an apocalyptic number.

231232221230020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231232221230020 is an abundant number, since it is smaller than the sum of its proper divisors (255113963949548).

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

231232221230020 is a wasteful number, since it uses less digits than its factorization.

231232221230020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542920 (or 542918 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 231232221230020 its reverse (20032122232132), we get a palindrome (251264343462152).

The spelling of 231232221230020 in words is "two hundred thirty-one trillion, two hundred thirty-two billion, two hundred twenty-one million, two hundred thirty thousand, twenty".