231212121212 has 12 divisors (see below), whose sum is σ = 406881667080. Its totient is φ = 114960216336.

The previous prime is 231212121197. The next prime is 231212121227. The reversal of 231212121212 is 212121212132.

231212121212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231212121197) and next prime (231212121227).

231212121212 is a modest number, since divided by 12121212 gives 2312 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161460263 + ... + 161461694.

It is an arithmetic number, because the mean of its divisors is an integer number (33906805590).

Almost surely, 2^231212121212 is an apocalyptic number.

It is an amenable number.

231212121212 is a deficient number, since it is larger than the sum of its proper divisors (175669545868).

231212121212 is a wasteful number, since it uses less digits than its factorization.

231212121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322922140 (or 322922138 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

Adding to 231212121212 its reverse (212121212132), we get a palindrome (443333333344).

The spelling of 231212121212 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twelve".