10521321205001 has 4 divisors (see below), whose sum is σ = 11140222452372. Its totient is φ = 9902419957632.

The previous prime is 10521321204991. The next prime is 10521321205019. The reversal of 10521321205001 is 10050212312501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2841904782025 + 7679416422976 = 1685795^2 + 2771176^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521321205001 - 2³⁰ = 10520247463177 is a prime.

It is a super-2 number, since 2×10521321205001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10521321205091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309450623660 + ... + 309450623693.

It is an arithmetic number, because the mean of its divisors is an integer number (2785055613093).

Almost surely, 2^{10521321205001} is an apocalyptic number.

It is an amenable number.

10521321205001 is a deficient number, since it is larger than the sum of its proper divisors (618901247371).

10521321205001 is an equidigital number, since it uses as much as digits as its factorization.

10521321205001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618901247370.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 10521321205001 its reverse (10050212312501), we get a palindrome (20571533517502).

The spelling of 10521321205001 in words is "ten trillion, five hundred twenty-one billion, three hundred twenty-one million, two hundred five thousand, one".