21110422443 has 16 divisors (see below), whose sum is σ = 30721680000. Its totient is φ = 12787690880.

The previous prime is 21110422433. The next prime is 21110422457. The reversal of 21110422443 is 34422401112.

It is a cyclic number.

It is not a de Polignac number, because 21110422443 - 2⁶ = 21110422379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110422433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96318 + ... + 226931.

It is an arithmetic number, because the mean of its divisors is an integer number (1920105000).

Almost surely, 2^21110422443 is an apocalyptic number.

21110422443 is a deficient number, since it is larger than the sum of its proper divisors (9611257557).

21110422443 is a wasteful number, since it uses less digits than its factorization.

21110422443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325242.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21110422443 its reverse (34422401112), we get a palindrome (55532823555).

The spelling of 21110422443 in words is "twenty-one billion, one hundred ten million, four hundred twenty-two thousand, four hundred forty-three".