223021200021 has 4 divisors (see below), whose sum is σ = 297361600032. Its totient is φ = 148680800012.

The previous prime is 223021200019. The next prime is 223021200047. The reversal of 223021200021 is 120002120322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 223021200021 - 2¹ = 223021200019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223021200071) 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, 37170200001 + ... + 37170200006.

It is an arithmetic number, because the mean of its divisors is an integer number (74340400008).

Almost surely, 2^223021200021 is an apocalyptic number.

It is an amenable number.

223021200021 is a deficient number, since it is larger than the sum of its proper divisors (74340400011).

223021200021 is an equidigital number, since it uses as much as digits as its factorization.

223021200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74340400010.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 223021200021 its reverse (120002120322), we get a palindrome (343023320343).

The spelling of 223021200021 in words is "two hundred twenty-three billion, twenty-one million, two hundred thousand, twenty-one".