211101061660691 has 2 divisors, whose sum is σ = 211101061660692. Its totient is φ = 211101061660690.

The previous prime is 211101061660631. The next prime is 211101061660759. The reversal of 211101061660691 is 196066160101112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211101061660691 - 2¹⁸ = 211101061398547 is a prime.

It is not a weakly prime, because it can be changed into another prime (211101061660631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550530830345 + 105550530830346.

It is an arithmetic number, because the mean of its divisors is an integer number (105550530830346).

Almost surely, 2^{211101061660691} is an apocalyptic number.

211101061660691 is a deficient number, since it is larger than the sum of its proper divisors (1).

211101061660691 is an equidigital number, since it uses as much as digits as its factorization.

211101061660691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 211101061660691 in words is "two hundred eleven trillion, one hundred one billion, sixty-one million, six hundred sixty thousand, six hundred ninety-one".