1220221222211 has 2 divisors, whose sum is σ = 1220221222212. Its totient is φ = 1220221222210.

The previous prime is 1220221222183. The next prime is 1220221222217. The reversal of 1220221222211 is 1122221220221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1122221220221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220221222211 - 2⁶ = 1220221222147 is a prime.

It is a super-2 number, since 2×1220221222211² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220221222217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610110611105 + 610110611106.

It is an arithmetic number, because the mean of its divisors is an integer number (610110611106).

Almost surely, 2^{1220221222211} is an apocalyptic number.

1220221222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220221222211 is an equidigital number, since it uses as much as digits as its factorization.

1220221222211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1220221222211 its reverse (1122221220221), we get a palindrome (2342442442432).

The spelling of 1220221222211 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".