231221003300 has 144 divisors (see below), whose sum is σ = 598677848832. Its totient is φ = 75788697600.

The previous prime is 231221003261. The next prime is 231221003353. The reversal of 231221003300 is 3300122132.

It is a super-2 number, since 2×231221003300² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54109964 + ... + 54114236.

Almost surely, 2^231221003300 is an apocalyptic number.

231221003300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231221003300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299338924416).

231221003300 is an abundant number, since it is smaller than the sum of its proper divisors (367456845532).

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

231221003300 is a wasteful number, since it uses less digits than its factorization.

231221003300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7678 (or 7671 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231221003300 its reverse (3300122132), we get a palindrome (234521125432).

The spelling of 231221003300 in words is "two hundred thirty-one billion, two hundred twenty-one million, three thousand, three hundred".