1201220000191 has 2 divisors, whose sum is σ = 1201220000192. Its totient is φ = 1201220000190.

The previous prime is 1201220000171. The next prime is 1201220000237. The reversal of 1201220000191 is 1910000221021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201220000191 - 2⁷ = 1201220000063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201220000171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600610000095 + 600610000096.

It is an arithmetic number, because the mean of its divisors is an integer number (600610000096).

Almost surely, 2^{1201220000191} is an apocalyptic number.

1201220000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201220000191 is an equidigital number, since it uses as much as digits as its factorization.

1201220000191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1201220000191 in words is "one trillion, two hundred one billion, two hundred twenty million, one hundred ninety-one", and thus it is an aban number.