21000023332321 has 16 divisors (see below), whose sum is σ = 22928656988160. Its totient is φ = 19074653191120.

The previous prime is 21000023332291. The next prime is 21000023332373. The reversal of 21000023332321 is 12323332000012.

It is a cyclic number.

It is not a de Polignac number, because 21000023332321 - 2¹³ = 21000023324129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000023332292 and 21000023332301.

It is not an unprimeable number, because it can be changed into a prime (21000023332021) 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, 63029256 + ... + 63361558.

It is an arithmetic number, because the mean of its divisors is an integer number (1433041061760).

Almost surely, 2^{21000023332321} is an apocalyptic number.

It is an amenable number.

21000023332321 is a deficient number, since it is larger than the sum of its proper divisors (1928633655839).

21000023332321 is a wasteful number, since it uses less digits than its factorization.

21000023332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337196.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21000023332321 its reverse (12323332000012), we get a palindrome (33323355332333).

The spelling of 21000023332321 in words is "twenty-one trillion, twenty-three million, three hundred thirty-two thousand, three hundred twenty-one".