12012212331 has 32 divisors (see below), whose sum is σ = 20343544320. Its totient is φ = 6862296672.

The previous prime is 12012212297. The next prime is 12012212353. The reversal of 12012212331 is 13321221021.

12012212331 is a `hidden beast` number, since 120 + 1 + 2 + 212 + 331 = 666.

It is not a de Polignac number, because 12012212331 - 2⁹ = 12012211819 is a prime.

It is a super-2 number, since 2×12012212331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12012212131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1062796 + ... + 1074038.

It is an arithmetic number, because the mean of its divisors is an integer number (635735760).

Almost surely, 2^12012212331 is an apocalyptic number.

12012212331 is a deficient number, since it is larger than the sum of its proper divisors (8331331989).

12012212331 is a wasteful number, since it uses less digits than its factorization.

12012212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16912 (or 16906 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12012212331 its reverse (13321221021), we get a palindrome (25333433352).

The spelling of 12012212331 in words is "twelve billion, twelve million, two hundred twelve thousand, three hundred thirty-one".