11212031 has 4 divisors (see below), whose sum is σ = 11235000. Its totient is φ = 11189064.

The previous prime is 11212013. The next prime is 11212037. The reversal of 11212031 is 13021211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212031 is a prime.

It is a super-2 number, since 2×11212031² = 251419278289922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10736 + ... + 11733.

It is an arithmetic number, because the mean of its divisors is an integer number (2808750).

Almost surely, 2^11212031 is an apocalyptic number.

11212031 is a deficient number, since it is larger than the sum of its proper divisors (22969).

11212031 is an equidigital number, since it uses as much as digits as its factorization.

11212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22968.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11212031 is about 3348.4370981101. The cubic root of 11212031 is about 223.8178725255.

Adding to 11212031 its reverse (13021211), we get a palindrome (24233242).

The spelling of 11212031 in words is "eleven million, two hundred twelve thousand, thirty-one".