11211210999 has 16 divisors (see below), whose sum is σ = 16922584800. Its totient is φ = 7333118208.

The previous prime is 11211210979. The next prime is 11211211001. The reversal of 11211210999 is 99901211211.

It is not a de Polignac number, because 11211210999 - 2⁸ = 11211210743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211210979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3915834 + ... + 3918695.

It is an arithmetic number, because the mean of its divisors is an integer number (1057661550).

Almost surely, 2^11211210999 is an apocalyptic number.

11211210999 is a deficient number, since it is larger than the sum of its proper divisors (5711373801).

11211210999 is an equidigital number, since it uses as much as digits as its factorization.

11211210999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7834591 (or 7834585 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 11211210999 in words is "eleven billion, two hundred eleven million, two hundred ten thousand, nine hundred ninety-nine".