21030222023 has 4 divisors (see below), whose sum is σ = 21598606440. Its totient is φ = 20461837608.

The previous prime is 21030221951. The next prime is 21030222041. The reversal of 21030222023 is 32022203012.

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 21030222023 - 2¹² = 21030217927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21030221992 and 21030222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060222023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284192153 + ... + 284192226.

It is an arithmetic number, because the mean of its divisors is an integer number (5399651610).

Almost surely, 2^21030222023 is an apocalyptic number.

21030222023 is a deficient number, since it is larger than the sum of its proper divisors (568384417).

21030222023 is an equidigital number, since it uses as much as digits as its factorization.

21030222023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568384416.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21030222023 its reverse (32022203012), we get a palindrome (53052425035).

The spelling of 21030222023 in words is "twenty-one billion, thirty million, two hundred twenty-two thousand, twenty-three".