10521421367 has 4 divisors (see below), whose sum is σ = 10529661816. Its totient is φ = 10513180920.

The previous prime is 10521421333. The next prime is 10521421373. The reversal of 10521421367 is 76312412501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10521421367 is a prime.

It is a super-2 number, since 2×10521421367² (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 (10521421667) 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, 4118309 + ... + 4120862.

It is an arithmetic number, because the mean of its divisors is an integer number (2632415454).

Almost surely, 2^10521421367 is an apocalyptic number.

10521421367 is a deficient number, since it is larger than the sum of its proper divisors (8240449).

10521421367 is an equidigital number, since it uses as much as digits as its factorization.

10521421367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8240448.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 10521421367 its reverse (76312412501), we get a palindrome (86833833868).

The spelling of 10521421367 in words is "ten billion, five hundred twenty-one million, four hundred twenty-one thousand, three hundred sixty-seven".