7213212211 has 2 divisors, whose sum is σ = 7213212212. Its totient is φ = 7213212210.

The previous prime is 7213212187. The next prime is 7213212283. The reversal of 7213212211 is 1122123127.

It is a weak prime.

It is an emirp because it is prime and its reverse (1122123127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7213212211 - 2²⁹ = 6676341299 is a prime.

It is not a weakly prime, because it can be changed into another prime (7213212911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606606105 + 3606606106.

It is an arithmetic number, because the mean of its divisors is an integer number (3606606106).

Almost surely, 2^7213212211 is an apocalyptic number.

7213212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

7213212211 is an equidigital number, since it uses as much as digits as its factorization.

7213212211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 7213212211 is about 84930.6317591009. The cubic root of 7213212211 is about 1932.1591816849.

Adding to 7213212211 its reverse (1122123127), we get a palindrome (8335335338).

The spelling of 7213212211 in words is "seven billion, two hundred thirteen million, two hundred twelve thousand, two hundred eleven".