21141012443 has 2 divisors, whose sum is σ = 21141012444. Its totient is φ = 21141012442.

The previous prime is 21141012427. The next prime is 21141012449. The reversal of 21141012443 is 34421014112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21141012443 - 2⁴ = 21141012427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21141012449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570506221 + 10570506222.

It is an arithmetic number, because the mean of its divisors is an integer number (10570506222).

Almost surely, 2^21141012443 is an apocalyptic number.

21141012443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141012443 is an equidigital number, since it uses as much as digits as its factorization.

21141012443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21141012443 its reverse (34421014112), we get a palindrome (55562026555).

The spelling of 21141012443 in words is "twenty-one billion, one hundred forty-one million, twelve thousand, four hundred forty-three".