21022110023 has 4 divisors (see below), whose sum is σ = 21064239000. Its totient is φ = 20979981048.

The previous prime is 21022110001. The next prime is 21022110049. The reversal of 21022110023 is 32001122012.

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 21022110023 - 2⁶ = 21022109959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022110623) 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, 21063740 + ... + 21064737.

It is an arithmetic number, because the mean of its divisors is an integer number (5266059750).

Almost surely, 2^21022110023 is an apocalyptic number.

21022110023 is a deficient number, since it is larger than the sum of its proper divisors (42128977).

21022110023 is an equidigital number, since it uses as much as digits as its factorization.

21022110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42128976.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21022110023 its reverse (32001122012), we get a palindrome (53023232035).

The spelling of 21022110023 in words is "twenty-one billion, twenty-two million, one hundred ten thousand, twenty-three".