231112121211 has 16 divisors (see below), whose sum is σ = 342404457120. Its totient is φ = 154067489280.

The previous prime is 231112121183. The next prime is 231112121213. The reversal of 231112121211 is 112121211132.

It is a happy number.

231112121211 is a `hidden beast` number, since 2 + 311 + 121 + 21 + 211 = 666.

It is not a de Polignac number, because 231112121211 - 2⁶ = 231112121147 is a prime.

It is a super-2 number, since 2×231112121211² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231112121213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416611 + ... + 797363.

It is an arithmetic number, because the mean of its divisors is an integer number (21400278570).

Almost surely, 2^231112121211 is an apocalyptic number.

231112121211 is a deficient number, since it is larger than the sum of its proper divisors (111292335909).

231112121211 is a wasteful number, since it uses less digits than its factorization.

231112121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403243 (or 403237 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 231112121211 its reverse (112121211132), we get a palindrome (343233332343).

It can be divided in two parts, 2311121 and 21211, that added together give a palindrome (2332332).

The spelling of 231112121211 in words is "two hundred thirty-one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred eleven".