11505120121099 has 8 divisors (see below), whose sum is σ = 12551097250800. Its totient is φ = 10459152511200.

The previous prime is 11505120121097. The next prime is 11505120121139. The reversal of 11505120121099 is 99012102150511.

11505120121099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11505120121099 - 2¹ = 11505120121097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505120121097) 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, 275877 + ... + 4804825.

It is an arithmetic number, because the mean of its divisors is an integer number (1568887156350).

Almost surely, 2^{11505120121099} is an apocalyptic number.

11505120121099 is a deficient number, since it is larger than the sum of its proper divisors (1045977129701).

11505120121099 is a wasteful number, since it uses less digits than its factorization.

11505120121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759901.

The product of its (nonzero) digits is 8100, while the sum is 37.

The spelling of 11505120121099 in words is "eleven trillion, five hundred five billion, one hundred twenty million, one hundred twenty-one thousand, ninety-nine".