231121232012 has 12 divisors (see below), whose sum is σ = 441231443016. Its totient is φ = 105055105440.

The previous prime is 231121231997. The next prime is 231121232029. The reversal of 231121232012 is 210232121132.

231121232012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 2626377593 + ... + 2626377680.

It is an arithmetic number, because the mean of its divisors is an integer number (36769286918).

Almost surely, 2^231121232012 is an apocalyptic number.

231121232012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231121232012 is a deficient number, since it is larger than the sum of its proper divisors (210110211004).

231121232012 is a wasteful number, since it uses less digits than its factorization.

231121232012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252755288 (or 5252755286 counting only the distinct ones).

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

Adding to 231121232012 its reverse (210232121132), we get a palindrome (441353353144).

The spelling of 231121232012 in words is "two hundred thirty-one billion, one hundred twenty-one million, two hundred thirty-two thousand, twelve".