11211432321 has 4 divisors (see below), whose sum is σ = 14948576432. Its totient is φ = 7474288212.

The previous prime is 11211432313. The next prime is 11211432341. The reversal of 11211432321 is 12323411211.

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.

It is not a de Polignac number, because 11211432321 - 2³ = 11211432313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11211432341) 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, 1868572051 + ... + 1868572056.

It is an arithmetic number, because the mean of its divisors is an integer number (3737144108).

Almost surely, 2^11211432321 is an apocalyptic number.

It is an amenable number.

11211432321 is a deficient number, since it is larger than the sum of its proper divisors (3737144111).

11211432321 is an equidigital number, since it uses as much as digits as its factorization.

11211432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737144110.

The product of its digits is 288, while the sum is 21.

Adding to 11211432321 its reverse (12323411211), we get a palindrome (23534843532).

The spelling of 11211432321 in words is "eleven billion, two hundred eleven million, four hundred thirty-two thousand, three hundred twenty-one".