11099129921 has 8 divisors (see below), whose sum is σ = 12158385888. Its totient is φ = 10048248000.

The previous prime is 11099129887. The next prime is 11099129953. The reversal of 11099129921 is 12992199011.

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 11099129921 - 2¹⁰ = 11099128897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11099129971) 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, 2090735 + ... + 2096036.

It is an arithmetic number, because the mean of its divisors is an integer number (1519798236).

Almost surely, 2^11099129921 is an apocalyptic number.

11099129921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11099129921 is a deficient number, since it is larger than the sum of its proper divisors (1059255967).

11099129921 is a wasteful number, since it uses less digits than its factorization.

11099129921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187023.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 11099129921 in words is "eleven billion, ninety-nine million, one hundred twenty-nine thousand, nine hundred twenty-one".