1122002191 has 2 divisors, whose sum is σ = 1122002192. Its totient is φ = 1122002190.

The previous prime is 1122002183. The next prime is 1122002213. The reversal of 1122002191 is 1912002211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1122002191 - 2³ = 1122002183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122002131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561001095 + 561001096.

It is an arithmetic number, because the mean of its divisors is an integer number (561001096).

Almost surely, 2^1122002191 is an apocalyptic number.

1122002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122002191 is an equidigital number, since it uses as much as digits as its factorization.

1122002191 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1122002191 is about 33496.3011540080. The cubic root of 1122002191 is about 1039.1172832281.

The spelling of 1122002191 in words is "one billion, one hundred twenty-two million, two thousand, one hundred ninety-one".