21223023022 has 4 divisors (see below), whose sum is σ = 31834534536. Its totient is φ = 10611511510.

The previous prime is 21223023011. The next prime is 21223023067. The reversal of 21223023022 is 22032032212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305755754 + ... + 5305755757.

It is an arithmetic number, because the mean of its divisors is an integer number (7958633634).

Almost surely, 2^21223023022 is an apocalyptic number.

21223023022 is a deficient number, since it is larger than the sum of its proper divisors (10611511514).

21223023022 is a wasteful number, since it uses less digits than its factorization.

21223023022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611511513.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21223023022 its reverse (22032032212), we get a palindrome (43255055234).

The spelling of 21223023022 in words is "twenty-one billion, two hundred twenty-three million, twenty-three thousand, twenty-two".