231212123311 has 8 divisors (see below), whose sum is σ = 249037477920. Its totient is φ = 213392455392.

The previous prime is 231212123293. The next prime is 231212123323. The reversal of 231212123311 is 113321212132.

231212123311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231212123311 - 2²³ = 231203734703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231212123341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1337035 + ... + 1500028.

It is an arithmetic number, because the mean of its divisors is an integer number (31129684740).

Almost surely, 2^231212123311 is an apocalyptic number.

231212123311 is a deficient number, since it is larger than the sum of its proper divisors (17825354609).

231212123311 is a wasteful number, since it uses less digits than its factorization.

231212123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843345.

The product of its digits is 432, while the sum is 22.

Adding to 231212123311 its reverse (113321212132), we get a palindrome (344533335443).

The spelling of 231212123311 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred twenty-three thousand, three hundred eleven".