21022043043 has 8 divisors (see below), whose sum is σ = 28031090688. Its totient is φ = 14013845384.

The previous prime is 21022042913. The next prime is 21022043047. The reversal of 21022043043 is 34034022012.

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 21022043043 - 2²⁵ = 20988488611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022043047) 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 7 ways as a sum of consecutive naturals, for example, 152355 + ... + 255452.

It is an arithmetic number, because the mean of its divisors is an integer number (3503886336).

Almost surely, 2^21022043043 is an apocalyptic number.

21022043043 is a deficient number, since it is larger than the sum of its proper divisors (7009047645).

21022043043 is a wasteful number, since it uses less digits than its factorization.

21022043043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424993.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21022043043 its reverse (34034022012), we get a palindrome (55056065055).

The spelling of 21022043043 in words is "twenty-one billion, twenty-two million, forty-three thousand, forty-three".