231321201212 has 6 divisors (see below), whose sum is σ = 404812102128. Its totient is φ = 115660600604.

The previous prime is 231321201191. The next prime is 231321201227. The reversal of 231321201212 is 212102123132.

231321201212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28915150148 + ... + 28915150155.

It is an arithmetic number, because the mean of its divisors is an integer number (67468683688).

Almost surely, 2^231321201212 is an apocalyptic number.

It is an amenable number.

231321201212 is a deficient number, since it is larger than the sum of its proper divisors (173490900916).

231321201212 is a wasteful number, since it uses less digits than its factorization.

231321201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57830300307 (or 57830300305 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231321201212 its reverse (212102123132), we get a palindrome (443423324344).

The spelling of 231321201212 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred one thousand, two hundred twelve".