21114321321 has 16 divisors (see below), whose sum is σ = 28962650304. Its totient is φ = 13672401984.

The previous prime is 21114321259. The next prime is 21114321331. The reversal of 21114321321 is 12312341112.

It is not a de Polignac number, because 21114321321 - 2⁶ = 21114321257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21114321331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96870 + ... + 227183.

It is an arithmetic number, because the mean of its divisors is an integer number (1810165644).

Almost surely, 2^21114321321 is an apocalyptic number.

It is an amenable number.

21114321321 is a deficient number, since it is larger than the sum of its proper divisors (7848328983).

21114321321 is a wasteful number, since it uses less digits than its factorization.

21114321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324680.

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

Adding to 21114321321 its reverse (12312341112), we get a palindrome (33426662433).

The spelling of 21114321321 in words is "twenty-one billion, one hundred fourteen million, three hundred twenty-one thousand, three hundred twenty-one".