1220122002191 has 2 divisors, whose sum is σ = 1220122002192. Its totient is φ = 1220122002190.

The previous prime is 1220122002179. The next prime is 1220122002287. The reversal of 1220122002191 is 1912002210221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220122002191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220122032191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610061001095 + 610061001096.

It is an arithmetic number, because the mean of its divisors is an integer number (610061001096).

Almost surely, 2^{1220122002191} is an apocalyptic number.

1220122002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220122002191 is an equidigital number, since it uses as much as digits as its factorization.

1220122002191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1220122002191 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, two thousand, one hundred ninety-one".