1211120202091 has 2 divisors, whose sum is σ = 1211120202092. Its totient is φ = 1211120202090.

The previous prime is 1211120202079. The next prime is 1211120202143. The reversal of 1211120202091 is 1902020211121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211120202091 - 2⁹ = 1211120201579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211120202011) 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, 605560101045 + 605560101046.

It is an arithmetic number, because the mean of its divisors is an integer number (605560101046).

Almost surely, 2^{1211120202091} is an apocalyptic number.

1211120202091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211120202091 is an equidigital number, since it uses as much as digits as its factorization.

1211120202091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1211120202091 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred two thousand, ninety-one".