231221330112020 has 12 divisors (see below), whose sum is σ = 485564793235284. Its totient is φ = 92488532044800.

The previous prime is 231221330111999. The next prime is 231221330112043. The reversal of 231221330112020 is 20211033122132.

It can be written as a sum of positive squares in 2 ways, for example, as 43782942129424 + 187438387982596 = 6616868^2 + 13690814^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5780533252781 + ... + 5780533252820.

It is an arithmetic number, because the mean of its divisors is an integer number (40463732769607).

Almost surely, 2^{231221330112020} is an apocalyptic number.

231221330112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231221330112020 is an abundant number, since it is smaller than the sum of its proper divisors (254343463123264).

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

231221330112020 is a wasteful number, since it uses less digits than its factorization.

231221330112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11561066505610 (or 11561066505608 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 231221330112020 its reverse (20211033122132), we get a palindrome (251432363234152).

The spelling of 231221330112020 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, three hundred thirty million, one hundred twelve thousand, twenty".