1211222210311 has 2 divisors, whose sum is σ = 1211222210312. Its totient is φ = 1211222210310.

The previous prime is 1211222210269. The next prime is 1211222210339. The reversal of 1211222210311 is 1130122221121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211222210311 - 2¹³ = 1211222202119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211222210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611105155 + 605611105156.

It is an arithmetic number, because the mean of its divisors is an integer number (605611105156).

Almost surely, 2^{1211222210311} is an apocalyptic number.

1211222210311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222210311 is an equidigital number, since it uses as much as digits as its factorization.

1211222210311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211222210311 its reverse (1130122221121), we get a palindrome (2341344431432).

The spelling of 1211222210311 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, three hundred eleven".