11210209991 has 2 divisors, whose sum is σ = 11210209992. Its totient is φ = 11210209990.

The previous prime is 11210209973. The next prime is 11210210017. The reversal of 11210209991 is 19990201211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11210209991 - 2¹⁰ = 11210208967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11210209961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605104995 + 5605104996.

It is an arithmetic number, because the mean of its divisors is an integer number (5605104996).

Almost surely, 2^11210209991 is an apocalyptic number.

11210209991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11210209991 is an equidigital number, since it uses as much as digits as its factorization.

11210209991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 11210209991 in words is "eleven billion, two hundred ten million, two hundred nine thousand, nine hundred ninety-one".