1001201001191 has 2 divisors, whose sum is σ = 1001201001192. Its totient is φ = 1001201001190.

The previous prime is 1001201001179. The next prime is 1001201001217. The reversal of 1001201001191 is 1911001021001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1911001021001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001201001191 - 2³⁴ = 984021132007 is a prime.

It is a super-3 number, since 3×1001201001191³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001201001091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600500595 + 500600500596.

It is an arithmetic number, because the mean of its divisors is an integer number (500600500596).

Almost surely, 2^{1001201001191} is an apocalyptic number.

1001201001191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201001191 is an equidigital number, since it uses as much as digits as its factorization.

1001201001191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 1001201001191 its reverse (1911001021001), we get a palindrome (2912202022192).

The spelling of 1001201001191 in words is "one trillion, one billion, two hundred one million, one thousand, one hundred ninety-one".