1012201221191 has 2 divisors, whose sum is σ = 1012201221192. Its totient is φ = 1012201221190.

The previous prime is 1012201221131. The next prime is 1012201221233. The reversal of 1012201221191 is 1911221022101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012201221191 - 2⁶ = 1012201221127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012201221131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506100610595 + 506100610596.

It is an arithmetic number, because the mean of its divisors is an integer number (506100610596).

Almost surely, 2^{1012201221191} is an apocalyptic number.

1012201221191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012201221191 is an equidigital number, since it uses as much as digits as its factorization.

1012201221191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 1012201221191 its reverse (1911221022101), we get a palindrome (2923422243292).

The spelling of 1012201221191 in words is "one trillion, twelve billion, two hundred one million, two hundred twenty-one thousand, one hundred ninety-one".