10521515001 has 4 divisors (see below), whose sum is σ = 14028686672. Its totient is φ = 7014343332.

The previous prime is 10521514981. The next prime is 10521515047. The reversal of 10521515001 is 10051512501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10051512501 = 3 ⋅3350504167.

It is not a de Polignac number, because 10521515001 - 2¹⁹ = 10520990713 is a prime.

It is a super-2 number, since 2×10521515001² (a number of 21 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 (10521515051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753585831 + ... + 1753585836.

It is an arithmetic number, because the mean of its divisors is an integer number (3507171668).

Almost surely, 2^10521515001 is an apocalyptic number.

It is an amenable number.

10521515001 is a deficient number, since it is larger than the sum of its proper divisors (3507171671).

10521515001 is an equidigital number, since it uses as much as digits as its factorization.

10521515001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507171670.

The product of its (nonzero) digits is 250, while the sum is 21.

The spelling of 10521515001 in words is "ten billion, five hundred twenty-one million, five hundred fifteen thousand, one".