231220303212 has 12 divisors (see below), whose sum is σ = 539514040856. Its totient is φ = 77073434400.

The previous prime is 231220303133. The next prime is 231220303271. The reversal of 231220303212 is 212303022132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 9634179289 + ... + 9634179312.

Almost surely, 2^231220303212 is an apocalyptic number.

It is an amenable number.

231220303212 is an abundant number, since it is smaller than the sum of its proper divisors (308293737644).

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

231220303212 is a wasteful number, since it uses less digits than its factorization.

231220303212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19268358608 (or 19268358606 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231220303212 its reverse (212303022132), we get a palindrome (443523325344).

The spelling of 231220303212 in words is "two hundred thirty-one billion, two hundred twenty million, three hundred three thousand, two hundred twelve".