10521452221 has 8 divisors (see below), whose sum is σ = 12025275584. Its totient is φ = 9017818560.

The previous prime is 10521452209. The next prime is 10521452231. The reversal of 10521452221 is 12225412501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10521452221 - 2⁹ = 10521451709 is a prime.

It is a super-2 number, since 2×10521452221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521452231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103426 + ... + 178156.

It is an arithmetic number, because the mean of its divisors is an integer number (1503159448).

Almost surely, 2^10521452221 is an apocalyptic number.

It is an amenable number.

10521452221 is a deficient number, since it is larger than the sum of its proper divisors (1503823363).

10521452221 is an equidigital number, since it uses as much as digits as its factorization.

10521452221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94851.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 10521452221 its reverse (12225412501), we get a palindrome (22746864722).

The spelling of 10521452221 in words is "ten billion, five hundred twenty-one million, four hundred fifty-two thousand, two hundred twenty-one".