21000222023 has 8 divisors (see below), whose sum is σ = 23699310480. Its totient is φ = 18432796480.

The previous prime is 21000222007. The next prime is 21000222071. The reversal of 21000222023 is 32022200012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21000222023 - 2⁴ = 21000222007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000221989 and 21000222007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000222623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32915390 + ... + 32916027.

It is an arithmetic number, because the mean of its divisors is an integer number (2962413810).

Almost surely, 2^21000222023 is an apocalyptic number.

21000222023 is a deficient number, since it is larger than the sum of its proper divisors (2699088457).

21000222023 is a wasteful number, since it uses less digits than its factorization.

21000222023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65831457.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21000222023 its reverse (32022200012), we get a palindrome (53022422035).

The spelling of 21000222023 in words is "twenty-one billion, two hundred twenty-two thousand, twenty-three".