11221220121099 has 4 divisors (see below), whose sum is σ = 14961626828136. Its totient is φ = 7480813414064.

The previous prime is 11221220121047. The next prime is 11221220121179. The reversal of 11221220121099 is 99012102212211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11221220121099 - 2⁹ = 11221220120587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221220121599) 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, 1870203353514 + ... + 1870203353519.

It is an arithmetic number, because the mean of its divisors is an integer number (3740406707034).

Almost surely, 2^{11221220121099} is an apocalyptic number.

11221220121099 is a deficient number, since it is larger than the sum of its proper divisors (3740406707037).

11221220121099 is an equidigital number, since it uses as much as digits as its factorization.

11221220121099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740406707036.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 11221220121099 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, ninety-nine".