211031211973 has 2 divisors, whose sum is σ = 211031211974. Its totient is φ = 211031211972.

The previous prime is 211031211943. The next prime is 211031211983. The reversal of 211031211973 is 379112130112.

211031211973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203840511169 + 7190700804 = 451487^2 + 84798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211031211973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211031211913) 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 as a sum of consecutive naturals, namely, 105515605986 + 105515605987.

It is an arithmetic number, because the mean of its divisors is an integer number (105515605987).

Almost surely, 2^211031211973 is an apocalyptic number.

It is an amenable number.

211031211973 is a deficient number, since it is larger than the sum of its proper divisors (1).

211031211973 is an equidigital number, since it uses as much as digits as its factorization.

211031211973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 211031211973 in words is "two hundred eleven billion, thirty-one million, two hundred eleven thousand, nine hundred seventy-three".