10521550330321 has 16 divisors (see below), whose sum is σ = 11727431069760. Its totient is φ = 9380943659520.

The previous prime is 10521550330301. The next prime is 10521550330331. The reversal of 10521550330321 is 12303305512501.

It is a cyclic number.

It is not a de Polignac number, because 10521550330321 - 2¹⁵ = 10521550297553 is a prime.

It is a super-2 number, since 2×10521550330321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10521550330301) 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, 5260261 + ... + 6979501.

It is an arithmetic number, because the mean of its divisors is an integer number (732964441860).

Almost surely, 2^{10521550330321} is an apocalyptic number.

It is an amenable number.

10521550330321 is a deficient number, since it is larger than the sum of its proper divisors (1205880739439).

10521550330321 is a wasteful number, since it uses less digits than its factorization.

10521550330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738224.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 10521550330321 its reverse (12303305512501), we get a palindrome (22824855842822).

The spelling of 10521550330321 in words is "ten trillion, five hundred twenty-one billion, five hundred fifty million, three hundred thirty thousand, three hundred twenty-one".