11211110999 has 32 divisors (see below), whose sum is σ = 12624482880. Its totient is φ = 9870336000.

The previous prime is 11211110993. The next prime is 11211111017. The reversal of 11211110999 is 99901111211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211110999 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211110993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11110607 + ... + 11111615.

It is an arithmetic number, because the mean of its divisors is an integer number (394515090).

Almost surely, 2^11211110999 is an apocalyptic number.

11211110999 is a deficient number, since it is larger than the sum of its proper divisors (1413371881).

11211110999 is a wasteful number, since it uses less digits than its factorization.

11211110999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 1458, while the sum is 35.

It can be divided in two parts, 112 and 11110999, that added together give a palindrome (11111111).

The spelling of 11211110999 in words is "eleven billion, two hundred eleven million, one hundred ten thousand, nine hundred ninety-nine".