221020000023 has 4 divisors (see below), whose sum is σ = 294693333368. Its totient is φ = 147346666680.

The previous prime is 221020000013. The next prime is 221020000027. The reversal of 221020000023 is 320000020122.

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

It is not a de Polignac number, because 221020000023 - 2²⁴ = 221003222807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221019999963 and 221020000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020000027) 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, 36836666668 + ... + 36836666673.

It is an arithmetic number, because the mean of its divisors is an integer number (73673333342).

Almost surely, 2^221020000023 is an apocalyptic number.

221020000023 is a deficient number, since it is larger than the sum of its proper divisors (73673333345).

221020000023 is an equidigital number, since it uses as much as digits as its factorization.

221020000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73673333344.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 221020000023 its reverse (320000020122), we get a palindrome (541020020145).

The spelling of 221020000023 in words is "two hundred twenty-one billion, twenty million, twenty-three", and thus it is an aban number.