231221213322020 has 24 divisors (see below), whose sum is σ = 485566837837368. Its totient is φ = 92488049164800.

The previous prime is 231221213322017. The next prime is 231221213322053. The reversal of 231221213322020 is 20223312122132.

It can be written as a sum of positive squares in 4 ways, for example, as 22349520990784 + 208871692331236 = 4727528^2 + 14452394^2 .

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, 22896191 + ... + 31411430.

It is an arithmetic number, because the mean of its divisors is an integer number (20231951576557).

Almost surely, 2^{231221213322020} is an apocalyptic number.

231221213322020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231221213322020 is an abundant number, since it is smaller than the sum of its proper divisors (254345624515348).

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

231221213322020 is a wasteful number, since it uses less digits than its factorization.

231221213322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54520511 (or 54520509 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 231221213322020 its reverse (20223312122132), we get a palindrome (251444525444152).

The spelling of 231221213322020 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirteen million, three hundred twenty-two thousand, twenty".