11382812921 has 4 divisors (see below), whose sum is σ = 11383135332. Its totient is φ = 11382490512.

The previous prime is 11382812863. The next prime is 11382812929. The reversal of 11382812921 is 12921828311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2066702521 + 9316110400 = 45461^2 + 96520^2 .

It is a cyclic number.

It is not a de Polignac number, because 11382812921 - 2²² = 11378618617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11382812929) 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, 100670 + ... + 181383.

It is an arithmetic number, because the mean of its divisors is an integer number (2845783833).

Almost surely, 2^11382812921 is an apocalyptic number.

It is an amenable number.

11382812921 is a deficient number, since it is larger than the sum of its proper divisors (322411).

11382812921 is an equidigital number, since it uses as much as digits as its factorization.

11382812921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322410.

The product of its digits is 13824, while the sum is 38.

The spelling of 11382812921 in words is "eleven billion, three hundred eighty-two million, eight hundred twelve thousand, nine hundred twenty-one".