12421022443 has 4 divisors (see below), whose sum is σ = 13151670840. Its totient is φ = 11690374048.

The previous prime is 12421022429. The next prime is 12421022479. The reversal of 12421022443 is 34422012421.

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

It is a cyclic number.

It is not a de Polignac number, because 12421022443 - 2²⁵ = 12387468011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421022543) 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, 365324173 + ... + 365324206.

It is an arithmetic number, because the mean of its divisors is an integer number (3287917710).

Almost surely, 2^12421022443 is an apocalyptic number.

12421022443 is a deficient number, since it is larger than the sum of its proper divisors (730648397).

12421022443 is an equidigital number, since it uses as much as digits as its factorization.

12421022443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730648396.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12421022443 its reverse (34422012421), we get a palindrome (46843034864).

The spelling of 12421022443 in words is "twelve billion, four hundred twenty-one million, twenty-two thousand, four hundred forty-three".