31223030211 has 12 divisors (see below), whose sum is σ = 45225563760. Its totient is φ = 20757369840.

The previous prime is 31223030207. The next prime is 31223030227. The reversal of 31223030211 is 11203032213.

It is not a de Polignac number, because 31223030211 - 2² = 31223030207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31223030281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4828560 + ... + 4835021.

It is an arithmetic number, because the mean of its divisors is an integer number (3768796980).

Almost surely, 2^31223030211 is an apocalyptic number.

31223030211 is a deficient number, since it is larger than the sum of its proper divisors (14002533549).

31223030211 is a wasteful number, since it uses less digits than its factorization.

31223030211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9663946 (or 9663943 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31223030211 its reverse (11203032213), we get a palindrome (42426062424).

The spelling of 31223030211 in words is "thirty-one billion, two hundred twenty-three million, thirty thousand, two hundred eleven".