12212031238 has 24 divisors (see below), whose sum is σ = 20142579744. Its totient is φ = 5548754640.

The previous prime is 12212031191. The next prime is 12212031239. The reversal of 12212031238 is 83213021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212031239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 723220 + ... + 739912.

It is an arithmetic number, because the mean of its divisors is an integer number (839274156).

Almost surely, 2^12212031238 is an apocalyptic number.

12212031238 is a deficient number, since it is larger than the sum of its proper divisors (7930548506).

12212031238 is a wasteful number, since it uses less digits than its factorization.

12212031238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19740 (or 19729 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 12212031238 its reverse (83213021221), we get a palindrome (95425052459).

The spelling of 12212031238 in words is "twelve billion, two hundred twelve million, thirty-one thousand, two hundred thirty-eight".