1012220191 has 2 divisors, whose sum is σ = 1012220192. Its totient is φ = 1012220190.

The previous prime is 1012220173. The next prime is 1012220227. The reversal of 1012220191 is 1910222101.

It is a happy number.

1012220191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012220191 - 2⁵ = 1012220159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012226191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506110095 + 506110096.

It is an arithmetic number, because the mean of its divisors is an integer number (506110096).

Almost surely, 2^1012220191 is an apocalyptic number.

1012220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012220191 is an equidigital number, since it uses as much as digits as its factorization.

1012220191 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 1012220191 is about 31815.4080753336. The cubic root of 1012220191 is about 1004.0569161741.

Adding to 1012220191 its reverse (1910222101), we get a palindrome (2922442292).

The spelling of 1012220191 in words is "one billion, twelve million, two hundred twenty thousand, one hundred ninety-one".