12111031 has 8 divisors (see below), whose sum is σ = 12549600. Its totient is φ = 11679360.

The previous prime is 12111023. The next prime is 12111053. The reversal of 12111031 is 13011121.

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 12111031 - 2³ = 12111023 is a prime.

It is a super-2 number, since 2×12111031² = 293354143765922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12110999 and 12111017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111061) 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, 1990 + ... + 5308.

It is an arithmetic number, because the mean of its divisors is an integer number (1568700).

Almost surely, 2^12111031 is an apocalyptic number.

12111031 is a deficient number, since it is larger than the sum of its proper divisors (438569).

12111031 is an equidigital number, since it uses as much as digits as its factorization.

12111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 12111031 is about 3480.0906597386. The cubic root of 12111031 is about 229.6467861351.

Adding to 12111031 its reverse (13011121), we get a palindrome (25122152).

The spelling of 12111031 in words is "twelve million, one hundred eleven thousand, thirty-one".