21022222023 has 24 divisors (see below), whose sum is σ = 33324310656. Its totient is φ = 12664438800.

The previous prime is 21022222021. The next prime is 21022222027. The reversal of 21022222023 is 32022222012.

It is not a de Polignac number, because 21022222023 - 2¹ = 21022222021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022221987 and 21022222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022222021) 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 23 ways as a sum of consecutive naturals, for example, 619233 + ... + 652298.

It is an arithmetic number, because the mean of its divisors is an integer number (1388512944).

Almost surely, 2^21022222023 is an apocalyptic number.

21022222023 is a deficient number, since it is larger than the sum of its proper divisors (12302088633).

21022222023 is a wasteful number, since it uses less digits than its factorization.

21022222023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271715 (or 1271712 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21022222023 its reverse (32022222012), we get a palindrome (53044444035).

The spelling of 21022222023 in words is "twenty-one billion, twenty-two million, two hundred twenty-two thousand, twenty-three".