211213320991 has 2 divisors, whose sum is σ = 211213320992. Its totient is φ = 211213320990.

The previous prime is 211213320961. The next prime is 211213321019. The reversal of 211213320991 is 199023312112.

211213320991 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 is a cyclic number.

It is not a de Polignac number, because 211213320991 - 2¹⁷ = 211213189919 is a prime.

It is a super-2 number, since 2×211213320991² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211213320961) 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, 105606660495 + 105606660496.

It is an arithmetic number, because the mean of its divisors is an integer number (105606660496).

Almost surely, 2^211213320991 is an apocalyptic number.

211213320991 is a deficient number, since it is larger than the sum of its proper divisors (1).

211213320991 is an equidigital number, since it uses as much as digits as its factorization.

211213320991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 211213320991 in words is "two hundred eleven billion, two hundred thirteen million, three hundred twenty thousand, nine hundred ninety-one".