21022233055 has 4 divisors (see below), whose sum is σ = 25226679672. Its totient is φ = 16817786440.

The previous prime is 21022233041. The next prime is 21022233083. The reversal of 21022233055 is 55033222012.

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

It is not a de Polignac number, because 21022233055 - 2⁷ = 21022232927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102223301 + ... + 2102223310.

It is an arithmetic number, because the mean of its divisors is an integer number (6306669918).

Almost surely, 2^21022233055 is an apocalyptic number.

21022233055 is a deficient number, since it is larger than the sum of its proper divisors (4204446617).

21022233055 is an equidigital number, since it uses as much as digits as its factorization.

21022233055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204446616.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 21022233055 its reverse (55033222012), we get a palindrome (76055455067).

The spelling of 21022233055 in words is "twenty-one billion, twenty-two million, two hundred thirty-three thousand, fifty-five".