11534213221 has 8 divisors (see below), whose sum is σ = 11686550400. Its totient is φ = 11382034560.

The previous prime is 11534213209. The next prime is 11534213263. The reversal of 11534213221 is 12231243511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11534213221 - 2⁹ = 11534212709 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 (11534214221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110586 + ... + 187876.

It is an arithmetic number, because the mean of its divisors is an integer number (1460818800).

Almost surely, 2^11534213221 is an apocalyptic number.

It is an amenable number.

11534213221 is a deficient number, since it is larger than the sum of its proper divisors (152337179).

11534213221 is an equidigital number, since it uses as much as digits as its factorization.

11534213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79259.

The product of its digits is 1440, while the sum is 25.

Adding to 11534213221 its reverse (12231243511), we get a palindrome (23765456732).

The spelling of 11534213221 in words is "eleven billion, five hundred thirty-four million, two hundred thirteen thousand, two hundred twenty-one".