11101999 has 8 divisors (see below), whose sum is σ = 11570688. Its totient is φ = 10640280.

The previous prime is 11101957. The next prime is 11102009. The reversal of 11101999 is 99910111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11101999 - 2¹¹ = 11099951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 11101999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644 + ... + 4990.

It is an arithmetic number, because the mean of its divisors is an integer number (1446336).

Almost surely, 2^11101999 is an apocalyptic number.

11101999 is a deficient number, since it is larger than the sum of its proper divisors (468689).

11101999 is a wasteful number, since it uses less digits than its factorization.

11101999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 11101999 is about 3331.9662363235. The cubic root of 11101999 is about 223.0833005372.

It can be divided in two parts, 11101 and 999, that added together give a square (12100 = 110²).

The spelling of 11101999 in words is "eleven million, one hundred one thousand, nine hundred ninety-nine".