1220201022191 has 2 divisors, whose sum is σ = 1220201022192. Its totient is φ = 1220201022190.

The previous prime is 1220201022179. The next prime is 1220201022203. The reversal of 1220201022191 is 1912201020221.

It is a balanced prime because it is at equal distance from previous prime (1220201022179) and next prime (1220201022203).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220201022191 is a prime.

It is a super-2 number, since 2×1220201022191² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220201022791) 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, 610100511095 + 610100511096.

It is an arithmetic number, because the mean of its divisors is an integer number (610100511096).

Almost surely, 2^{1220201022191} is an apocalyptic number.

1220201022191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220201022191 is an equidigital number, since it uses as much as digits as its factorization.

1220201022191 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 1220201022191 in words is "one trillion, two hundred twenty billion, two hundred one million, twenty-two thousand, one hundred ninety-one".