11208913321 has 4 divisors (see below), whose sum is σ = 11221695172. Its totient is φ = 11196131472.

The previous prime is 11208913283. The next prime is 11208913351. The reversal of 11208913321 is 12331980211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12331980211 = 661 ⋅18656551.

It can be written as a sum of positive squares in 2 ways, for example, as 6484275625 + 4724637696 = 80525^2 + 68736^2 .

It is a cyclic number.

It is not a de Polignac number, because 11208913321 - 2¹³ = 11208905129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11208913351) 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, 6389610 + ... + 6391363.

It is an arithmetic number, because the mean of its divisors is an integer number (2805423793).

Almost surely, 2^11208913321 is an apocalyptic number.

It is an amenable number.

11208913321 is a deficient number, since it is larger than the sum of its proper divisors (12781851).

11208913321 is an equidigital number, since it uses as much as digits as its factorization.

11208913321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12781850.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 11208913321 in words is "eleven billion, two hundred eight million, nine hundred thirteen thousand, three hundred twenty-one".