1220220202111 has 2 divisors, whose sum is σ = 1220220202112. Its totient is φ = 1220220202110.

The previous prime is 1220220202079. The next prime is 1220220202121. The reversal of 1220220202111 is 1112020220221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220220202111 - 2⁵ = 1220220202079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220220202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610110101055 + 610110101056.

It is an arithmetic number, because the mean of its divisors is an integer number (610110101056).

Almost surely, 2^{1220220202111} is an apocalyptic number.

1220220202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220220202111 is an equidigital number, since it uses as much as digits as its factorization.

1220220202111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220220202111 its reverse (1112020220221), we get a palindrome (2332240422332).

The spelling of 1220220202111 in words is "one trillion, two hundred twenty billion, two hundred twenty million, two hundred two thousand, one hundred eleven".