21322412043 has 4 divisors (see below), whose sum is σ = 28429882728. Its totient is φ = 14214941360.

The previous prime is 21322412029. The next prime is 21322412051. The reversal of 21322412043 is 34021422312.

It is a happy number.

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 21322412043 - 2¹⁴ = 21322395659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21322412003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553735338 + ... + 3553735343.

It is an arithmetic number, because the mean of its divisors is an integer number (7107470682).

Almost surely, 2^21322412043 is an apocalyptic number.

21322412043 is a deficient number, since it is larger than the sum of its proper divisors (7107470685).

21322412043 is an equidigital number, since it uses as much as digits as its factorization.

21322412043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107470684.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21322412043 its reverse (34021422312), we get a palindrome (55343834355).

The spelling of 21322412043 in words is "twenty-one billion, three hundred twenty-two million, four hundred twelve thousand, forty-three".