1220220220211 has 2 divisors, whose sum is σ = 1220220220212. Its totient is φ = 1220220220210.

The previous prime is 1220220220201. The next prime is 1220220220213. The reversal of 1220220220211 is 1120220220221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220220220211 is a prime.

Together with 1220220220213, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220220220211.

It is not a weakly prime, because it can be changed into another prime (1220220220213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610110110105 + 610110110106.

It is an arithmetic number, because the mean of its divisors is an integer number (610110110106).

Almost surely, 2^{1220220220211} is an apocalyptic number.

1220220220211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220220220211 is an equidigital number, since it uses as much as digits as its factorization.

1220220220211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220220220211 its reverse (1120220220221), we get a palindrome (2340440440432).

The spelling of 1220220220211 in words is "one trillion, two hundred twenty billion, two hundred twenty million, two hundred twenty thousand, two hundred eleven".