1222212611 has 2 divisors, whose sum is σ = 1222212612. Its totient is φ = 1222212610.

The previous prime is 1222212559. The next prime is 1222212613. The reversal of 1222212611 is 1162122221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222212611 - 2⁶ = 1222212547 is a prime.

Together with 1222212613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1222212613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106305 + 611106306.

It is an arithmetic number, because the mean of its divisors is an integer number (611106306).

Almost surely, 2^1222212611 is an apocalyptic number.

1222212611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212611 is an equidigital number, since it uses as much as digits as its factorization.

1222212611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 1222212611 is about 34960.1574796224. The cubic root of 1222212611 is about 1069.1753074162.

Adding to 1222212611 its reverse (1162122221), we get a palindrome (2384334832).

The spelling of 1222212611 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, six hundred eleven".