1220111022211 has 2 divisors, whose sum is σ = 1220111022212. Its totient is φ = 1220111022210.

The previous prime is 1220111022209. The next prime is 1220111022241. The reversal of 1220111022211 is 1122201110221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220111022211 - 2¹ = 1220111022209 is a prime.

Together with 1220111022209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1220111022241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610055511105 + 610055511106.

It is an arithmetic number, because the mean of its divisors is an integer number (610055511106).

Almost surely, 2^{1220111022211} is an apocalyptic number.

1220111022211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111022211 is an equidigital number, since it uses as much as digits as its factorization.

1220111022211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1220111022211 its reverse (1122201110221), we get a palindrome (2342312132432).

The spelling of 1220111022211 in words is "one trillion, two hundred twenty billion, one hundred eleven million, twenty-two thousand, two hundred eleven".