10540521021 has 4 divisors (see below), whose sum is σ = 14054028032. Its totient is φ = 7027014012.

The previous prime is 10540521001. The next prime is 10540521077. The reversal of 10540521021 is 12012504501.

10540521021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10540521021 - 2¹⁵ = 10540488253 is a prime.

It is a super-2 number, since 2×10540521021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10540521001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756753501 + ... + 1756753506.

It is an arithmetic number, because the mean of its divisors is an integer number (3513507008).

Almost surely, 2^10540521021 is an apocalyptic number.

It is an amenable number.

10540521021 is a deficient number, since it is larger than the sum of its proper divisors (3513507011).

10540521021 is an equidigital number, since it uses as much as digits as its factorization.

10540521021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513507010.

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 10540521021 in words is "ten billion, five hundred forty million, five hundred twenty-one thousand, twenty-one".