231201223212 has 48 divisors (see below), whose sum is σ = 551699215200. Its totient is φ = 75338661888.

The previous prime is 231201223147. The next prime is 231201223241. The reversal of 231201223212 is 212322102132.

231201223212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231201223212² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1068837 + ... + 1266812.

It is an arithmetic number, because the mean of its divisors is an integer number (11493733650).

Almost surely, 2^231201223212 is an apocalyptic number.

It is an amenable number.

231201223212 is an abundant number, since it is smaller than the sum of its proper divisors (320497991988).

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

231201223212 is a wasteful number, since it uses less digits than its factorization.

231201223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335842 (or 2335840 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 231201223212 its reverse (212322102132), we get a palindrome (443523325344).

The spelling of 231201223212 in words is "two hundred thirty-one billion, two hundred one million, two hundred twenty-three thousand, two hundred twelve".