224002420021 has 4 divisors (see below), whose sum is σ = 224095330944. Its totient is φ = 223909509100.

The previous prime is 224002420001. The next prime is 224002420051. The reversal of 224002420021 is 120024200422.

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 224002420021 - 2⁵ = 224002419989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224002420001) 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, 46451845 + ... + 46456666.

It is an arithmetic number, because the mean of its divisors is an integer number (56023832736).

Almost surely, 2^224002420021 is an apocalyptic number.

It is an amenable number.

224002420021 is a deficient number, since it is larger than the sum of its proper divisors (92910923).

224002420021 is an equidigital number, since it uses as much as digits as its factorization.

224002420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92910922.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 224002420021 its reverse (120024200422), we get a palindrome (344026620443).

The spelling of 224002420021 in words is "two hundred twenty-four billion, two million, four hundred twenty thousand, twenty-one".