31112233321 has 8 divisors (see below), whose sum is σ = 33964462280. Its totient is φ = 28325572992.

The previous prime is 31112233301. The next prime is 31112233367. The reversal of 31112233321 is 12333221113.

It can be written as a sum of positive squares in 4 ways, for example, as 3529666921 + 27582566400 = 59411^2 + 166080^2 .

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 31112233321 - 2³¹ = 28964749673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31112233292 and 31112233301.

It is not an unprimeable number, because it can be changed into a prime (31112233301) 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 7 ways as a sum of consecutive naturals, for example, 16391166 + ... + 16393063.

It is an arithmetic number, because the mean of its divisors is an integer number (4245557785).

Almost surely, 2^31112233321 is an apocalyptic number.

It is an amenable number.

31112233321 is a deficient number, since it is larger than the sum of its proper divisors (2852228959).

31112233321 is a wasteful number, since it uses less digits than its factorization.

31112233321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32784315.

The product of its digits is 648, while the sum is 22.

Adding to 31112233321 its reverse (12333221113), we get a palindrome (43445454434).

It can be divided in two parts, 311122 and 33321, that added together give a palindrome (344443).

The spelling of 31112233321 in words is "thirty-one billion, one hundred twelve million, two hundred thirty-three thousand, three hundred twenty-one".