21321013330 has 8 divisors (see below), whose sum is σ = 38377824012. Its totient is φ = 8528405328.

The previous prime is 21321013261. The next prime is 21321013339. The reversal of 21321013330 is 3331012312.

It can be written as a sum of positive squares in 2 ways, for example, as 19645666569 + 1675346761 = 140163^2 + 40931^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21321013298 and 21321013307.

It is not an unprimeable number, because it can be changed into a prime (21321013339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066050657 + ... + 1066050676.

Almost surely, 2^21321013330 is an apocalyptic number.

21321013330 is a deficient number, since it is larger than the sum of its proper divisors (17056810682).

21321013330 is a wasteful number, since it uses less digits than its factorization.

21321013330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132101340.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21321013330 its reverse (3331012312), we get a palindrome (24652025642).

The spelling of 21321013330 in words is "twenty-one billion, three hundred twenty-one million, thirteen thousand, three hundred thirty".