1012200191 has 2 divisors, whose sum is σ = 1012200192. Its totient is φ = 1012200190.

The previous prime is 1012200187. The next prime is 1012200199. The reversal of 1012200191 is 1910022101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012200191 - 2² = 1012200187 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012200199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506100095 + 506100096.

It is an arithmetic number, because the mean of its divisors is an integer number (506100096).

Almost surely, 2^1012200191 is an apocalyptic number.

1012200191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012200191 is an equidigital number, since it uses as much as digits as its factorization.

1012200191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1012200191 is about 31815.0937606665. The cubic root of 1012200191 is about 1004.0503032287.

Adding to 1012200191 its reverse (1910022101), we get a palindrome (2922222292).

The spelling of 1012200191 in words is "one billion, twelve million, two hundred thousand, one hundred ninety-one".