31123222233211 has 8 divisors (see below), whose sum is σ = 32478460486560. Its totient is φ = 29768155203072.

The previous prime is 31123222233203. The next prime is 31123222233239. The reversal of 31123222233211 is 11233222232113.

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 31123222233211 - 2³ = 31123222233203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31123222233211.

It is not an unprimeable number, because it can be changed into a prime (31123222233241) 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, 42434280 + ... + 43161493.

It is an arithmetic number, because the mean of its divisors is an integer number (4059807560820).

Almost surely, 2^{31123222233211} is an apocalyptic number.

31123222233211 is a deficient number, since it is larger than the sum of its proper divisors (1355238253349).

31123222233211 is a wasteful number, since it uses less digits than its factorization.

31123222233211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85611605.

The product of its digits is 5184, while the sum is 28.

Adding to 31123222233211 its reverse (11233222232113), we get a palindrome (42356444465324).

The spelling of 31123222233211 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-two million, two hundred thirty-three thousand, two hundred eleven".