11132312221 has 4 divisors (see below), whose sum is σ = 11181353472. Its totient is φ = 11083270972.

The previous prime is 11132312209. The next prime is 11132312227. The reversal of 11132312221 is 12221323111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12221323111 = 107 ⋅114217973.

It is a cyclic number.

It is not a de Polignac number, because 11132312221 - 2⁵ = 11132312189 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 (11132312227) 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, 24520285 + ... + 24520738.

It is an arithmetic number, because the mean of its divisors is an integer number (2795338368).

Almost surely, 2^11132312221 is an apocalyptic number.

It is an amenable number.

11132312221 is a deficient number, since it is larger than the sum of its proper divisors (49041251).

11132312221 is an equidigital number, since it uses as much as digits as its factorization.

11132312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49041250.

The product of its digits is 144, while the sum is 19.

Adding to 11132312221 its reverse (12221323111), we get a palindrome (23353635332).

The spelling of 11132312221 in words is "eleven billion, one hundred thirty-two million, three hundred twelve thousand, two hundred twenty-one".