31211130822211 has 2 divisors, whose sum is σ = 31211130822212. Its totient is φ = 31211130822210.

The previous prime is 31211130822199. The next prime is 31211130822227. The reversal of 31211130822211 is 11222803111213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31211130822211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31211130822211.

It is not a weakly prime, because it can be changed into another prime (31211130822281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605565411105 + 15605565411106.

It is an arithmetic number, because the mean of its divisors is an integer number (15605565411106).

Almost surely, 2^{31211130822211} is an apocalyptic number.

31211130822211 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211130822211 is an equidigital number, since it uses as much as digits as its factorization.

31211130822211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 31211130822211 its reverse (11222803111213), we get a palindrome (42433933933424).

The spelling of 31211130822211 in words is "thirty-one trillion, two hundred eleven billion, one hundred thirty million, eight hundred twenty-two thousand, two hundred eleven".