10521440332401 has 4 divisors (see below), whose sum is σ = 14028587109872. Its totient is φ = 7014293554932.

The previous prime is 10521440332267. The next prime is 10521440332409. The reversal of 10521440332401 is 10423304412501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10521440332401 - 2¹⁰ = 10521440331377 is a prime.

It is a super-2 number, since 2×10521440332401² (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 (10521440332409) 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, 1753573388731 + ... + 1753573388736.

It is an arithmetic number, because the mean of its divisors is an integer number (3507146777468).

Almost surely, 2^{10521440332401} is an apocalyptic number.

It is an amenable number.

10521440332401 is a deficient number, since it is larger than the sum of its proper divisors (3507146777471).

10521440332401 is an equidigital number, since it uses as much as digits as its factorization.

10521440332401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507146777470.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 10521440332401 its reverse (10423304412501), we get a palindrome (20944744744902).

The spelling of 10521440332401 in words is "ten trillion, five hundred twenty-one billion, four hundred forty million, three hundred thirty-two thousand, four hundred one".