11221323109 has 4 divisors (see below), whose sum is σ = 11332425420. Its totient is φ = 11110220800.

The previous prime is 11221323101. The next prime is 11221323131. The reversal of 11221323109 is 90132312211.

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 11087458209 + 133864900 = 105297^2 + 11570^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221323109 - 2³ = 11221323101 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 (11221323101) 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, 55551004 + ... + 55551205.

It is an arithmetic number, because the mean of its divisors is an integer number (2833106355).

Almost surely, 2^11221323109 is an apocalyptic number.

It is an amenable number.

11221323109 is a deficient number, since it is larger than the sum of its proper divisors (111102311).

11221323109 is a wasteful number, since it uses less digits than its factorization.

11221323109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111102310.

The product of its (nonzero) digits is 648, while the sum is 25.

It can be divided in two parts, 1122 and 1323109, that added together give a palindrome (1324231).

The spelling of 11221323109 in words is "eleven billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred nine".