1211222100211 has 2 divisors, whose sum is σ = 1211222100212. Its totient is φ = 1211222100210.

The previous prime is 1211222100113. The next prime is 1211222100239. The reversal of 1211222100211 is 1120012221121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211222100211 - 2⁹ = 1211222099699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211222101211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611050105 + 605611050106.

It is an arithmetic number, because the mean of its divisors is an integer number (605611050106).

Almost surely, 2^{1211222100211} is an apocalyptic number.

1211222100211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211222100211 is an equidigital number, since it uses as much as digits as its factorization.

1211222100211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211222100211 its reverse (1120012221121), we get a palindrome (2331234321332).

The spelling of 1211222100211 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred thousand, two hundred eleven".