11223121099 has 4 divisors (see below), whose sum is σ = 11223399960. Its totient is φ = 11222842240.

The previous prime is 11223121067. The next prime is 11223121109. The reversal of 11223121099 is 99012132211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99012132211 = 103 ⋅961282837.

It is a cyclic number.

It is not a de Polignac number, because 11223121099 - 2⁵ = 11223121067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11223121099.

It is not an unprimeable number, because it can be changed into a prime (11223121199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66262 + ... + 163819.

It is an arithmetic number, because the mean of its divisors is an integer number (2805849990).

Almost surely, 2^11223121099 is an apocalyptic number.

11223121099 is a deficient number, since it is larger than the sum of its proper divisors (278861).

11223121099 is an equidigital number, since it uses as much as digits as its factorization.

11223121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278860.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 11223121099 in words is "eleven billion, two hundred twenty-three million, one hundred twenty-one thousand, ninety-nine".