11121535399 has 4 divisors (see below), whose sum is σ = 11977038136. Its totient is φ = 10266032664.

The previous prime is 11121535393. The next prime is 11121535429. The reversal of 11121535399 is 99353512111.

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 11121535399 - 2⁵ = 11121535367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121535393) 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, 427751349 + ... + 427751374.

It is an arithmetic number, because the mean of its divisors is an integer number (2994259534).

Almost surely, 2^11121535399 is an apocalyptic number.

11121535399 is a deficient number, since it is larger than the sum of its proper divisors (855502737).

11121535399 is an equidigital number, since it uses as much as digits as its factorization.

11121535399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855502736.

The product of its digits is 36450, while the sum is 40.

The spelling of 11121535399 in words is "eleven billion, one hundred twenty-one million, five hundred thirty-five thousand, three hundred ninety-nine".