11001211999 has 2 divisors, whose sum is σ = 11001212000. Its totient is φ = 11001211998.

The previous prime is 11001211997. The next prime is 11001212011. The reversal of 11001211999 is 99911210011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11001211999 - 2¹ = 11001211997 is a prime.

Together with 11001211997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001211993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500605999 + 5500606000.

It is an arithmetic number, because the mean of its divisors is an integer number (5500606000).

Almost surely, 2^11001211999 is an apocalyptic number.

11001211999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001211999 is an equidigital number, since it uses as much as digits as its factorization.

11001211999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 11001211999 in words is "eleven billion, one million, two hundred eleven thousand, nine hundred ninety-nine".