1201110021191 has 2 divisors, whose sum is σ = 1201110021192. Its totient is φ = 1201110021190.

The previous prime is 1201110021179. The next prime is 1201110021277. The reversal of 1201110021191 is 1911200111021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201110021191 - 2³⁰ = 1200036279367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201110021691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600555010595 + 600555010596.

It is an arithmetic number, because the mean of its divisors is an integer number (600555010596).

Almost surely, 2^{1201110021191} is an apocalyptic number.

1201110021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201110021191 is an equidigital number, since it uses as much as digits as its factorization.

1201110021191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 1201110021191 in words is "one trillion, two hundred one billion, one hundred ten million, twenty-one thousand, one hundred ninety-one".