12111312031 has 8 divisors (see below), whose sum is σ = 14906230304. Its totient is φ = 9582576480.

The previous prime is 12111311981. The next prime is 12111312043. The reversal of 12111312031 is 13021311121.

It is a happy number.

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 12111312031 - 2⁷ = 12111311903 is a prime.

It is a super-2 number, since 2×12111312031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111311996 and 12111312014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111313031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66545580 + ... + 66545761.

It is an arithmetic number, because the mean of its divisors is an integer number (1863278788).

Almost surely, 2^12111312031 is an apocalyptic number.

12111312031 is a deficient number, since it is larger than the sum of its proper divisors (2794918273).

12111312031 is a wasteful number, since it uses less digits than its factorization.

12111312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133091361.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12111312031 its reverse (13021311121), we get a palindrome (25132623152).

The spelling of 12111312031 in words is "twelve billion, one hundred eleven million, three hundred twelve thousand, thirty-one".