12212031 has 8 divisors (see below), whose sum is σ = 17535280. Its totient is φ = 7515072.

The previous prime is 12212029. The next prime is 12212051. The reversal of 12212031 is 13021221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12212031 - 2¹ = 12212029 is a prime.

It is a super-2 number, since 2×12212031² = 298267402289922, 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 = 12211998 and 12212016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212021) 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, 156526 + ... + 156603.

It is an arithmetic number, because the mean of its divisors is an integer number (2191910).

Almost surely, 2^12212031 is an apocalyptic number.

12212031 is a deficient number, since it is larger than the sum of its proper divisors (5323249).

12212031 is a wasteful number, since it uses less digits than its factorization.

12212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313145.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12212031 is about 3494.5716475700. The cubic root of 12212031 is about 230.2833998712.

Adding to 12212031 its reverse (13021221), we get a palindrome (25233252).

The spelling of 12212031 in words is "twelve million, two hundred twelve thousand, thirty-one".