21033014321 has 16 divisors (see below), whose sum is σ = 23440969728. Its totient is φ = 18707970000.

The previous prime is 21033014287. The next prime is 21033014341. The reversal of 21033014321 is 12341033012.

It is a cyclic number.

It is not a de Polignac number, because 21033014321 - 2⁶ = 21033014257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21033014293 and 21033014302.

It is not an unprimeable number, because it can be changed into a prime (21033014341) 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, 2451986 + ... + 2460548.

It is an arithmetic number, because the mean of its divisors is an integer number (1465060608).

Almost surely, 2^21033014321 is an apocalyptic number.

It is an amenable number.

21033014321 is a deficient number, since it is larger than the sum of its proper divisors (2407955407).

21033014321 is a wasteful number, since it uses less digits than its factorization.

21033014321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13372.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21033014321 its reverse (12341033012), we get a palindrome (33374047333).

The spelling of 21033014321 in words is "twenty-one billion, thirty-three million, fourteen thousand, three hundred twenty-one".