11099145421 has 32 divisors (see below), whose sum is σ = 13799116800. Its totient is φ = 8693092800.

The previous prime is 11099145391. The next prime is 11099145427. The reversal of 11099145421 is 12454199011.

11099145421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11099145421 - 2¹⁹ = 11098621133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11099145427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3891646 + ... + 3894496.

It is an arithmetic number, because the mean of its divisors is an integer number (431222400).

Almost surely, 2^11099145421 is an apocalyptic number.

It is an amenable number.

11099145421 is a deficient number, since it is larger than the sum of its proper divisors (2699971379).

11099145421 is a wasteful number, since it uses less digits than its factorization.

11099145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289.

The product of its (nonzero) digits is 12960, while the sum is 37.

It can be divided in two parts, 11099 and 145421, that added together give a triangular number (156520 = T₅₅₉).

The spelling of 11099145421 in words is "eleven billion, ninety-nine million, one hundred forty-five thousand, four hundred twenty-one".