21033150321 has 8 divisors (see below), whose sum is σ = 28052046144. Its totient is φ = 14018177360.

The previous prime is 21033150301. The next prime is 21033150349. The reversal of 21033150321 is 12305133012.

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

It is a cyclic number.

It is not a de Polignac number, because 21033150321 - 2¹¹ = 21033148273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033150301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968181 + ... + 989666.

It is an arithmetic number, because the mean of its divisors is an integer number (3506505768).

Almost surely, 2^21033150321 is an apocalyptic number.

It is an amenable number.

21033150321 is a deficient number, since it is larger than the sum of its proper divisors (7018895823).

21033150321 is a wasteful number, since it uses less digits than its factorization.

21033150321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961431.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21033150321 its reverse (12305133012), we get a palindrome (33338283333).

The spelling of 21033150321 in words is "twenty-one billion, thirty-three million, one hundred fifty thousand, three hundred twenty-one".