10005515453221 has 4 divisors (see below), whose sum is σ = 10350533227500. Its totient is φ = 9660497678944.

The previous prime is 10005515453189. The next prime is 10005515453243. The reversal of 10005515453221 is 12235451550001.

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 6260574468996 + 3744940984225 = 2502114^2 + 1935185^2 .

It is a cyclic number.

It is not a de Polignac number, because 10005515453221 - 2⁵ = 10005515453189 is a prime.

It is a super-2 number, since 2×10005515453221² (a number of 27 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 (10005515453821) 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, 172508887096 + ... + 172508887153.

It is an arithmetic number, because the mean of its divisors is an integer number (2587633306875).

Almost surely, 2^{10005515453221} is an apocalyptic number.

It is an amenable number.

10005515453221 is a deficient number, since it is larger than the sum of its proper divisors (345017774279).

10005515453221 is an equidigital number, since it uses as much as digits as its factorization.

10005515453221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345017774278.

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 10005515453221 in words is "ten trillion, five billion, five hundred fifteen million, four hundred fifty-three thousand, two hundred twenty-one".