21114121321 has 8 divisors (see below), whose sum is σ = 21862774080. Its totient is φ = 20366840592.

The previous prime is 21114121289. The next prime is 21114121339. The reversal of 21114121321 is 12312141112.

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

It is not a de Polignac number, because 21114121321 - 2⁵ = 21114121289 is a prime.

It is a super-2 number, since 2×21114121321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21114121351) 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, 311635 + ... + 373288.

It is an arithmetic number, because the mean of its divisors is an integer number (2732846760).

Almost surely, 2^21114121321 is an apocalyptic number.

It is an amenable number.

21114121321 is a deficient number, since it is larger than the sum of its proper divisors (748652759).

21114121321 is a wasteful number, since it uses less digits than its factorization.

21114121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686015.

The product of its digits is 96, while the sum is 19.

Adding to 21114121321 its reverse (12312141112), we get a palindrome (33426262433).

The spelling of 21114121321 in words is "twenty-one billion, one hundred fourteen million, one hundred twenty-one thousand, three hundred twenty-one".