1201034211991 has 2 divisors, whose sum is σ = 1201034211992. Its totient is φ = 1201034211990.

The previous prime is 1201034211967. The next prime is 1201034212039. The reversal of 1201034211991 is 1991124301021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201034211991 - 2¹¹ = 1201034209943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201034211931) 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, 600517105995 + 600517105996.

It is an arithmetic number, because the mean of its divisors is an integer number (600517105996).

Almost surely, 2^{1201034211991} is an apocalyptic number.

1201034211991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201034211991 is an equidigital number, since it uses as much as digits as its factorization.

1201034211991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 1201034211991 in words is "one trillion, two hundred one billion, thirty-four million, two hundred eleven thousand, nine hundred ninety-one".