1220122202191 has 2 divisors, whose sum is σ = 1220122202192. Its totient is φ = 1220122202190.

The previous prime is 1220122202183. The next prime is 1220122202197. The reversal of 1220122202191 is 1912022210221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220122202191 - 2³ = 1220122202183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220122202197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610061101095 + 610061101096.

It is an arithmetic number, because the mean of its divisors is an integer number (610061101096).

Almost surely, 2^{1220122202191} is an apocalyptic number.

1220122202191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220122202191 is an equidigital number, since it uses as much as digits as its factorization.

1220122202191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 1220122202191 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred two thousand, one hundred ninety-one".