223312244021 has 4 divisors (see below), whose sum is σ = 224682257952. Its totient is φ = 221942230092.

The previous prime is 223312243991. The next prime is 223312244039. The reversal of 223312244021 is 120442213322.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120442213322 = 2 ⋅60221106661.

It is a cyclic number.

It is not a de Polignac number, because 223312244021 - 2¹⁰ = 223312242997 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 (223312244081) 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, 685006721 + ... + 685007046.

It is an arithmetic number, because the mean of its divisors is an integer number (56170564488).

Almost surely, 2^223312244021 is an apocalyptic number.

It is an amenable number.

223312244021 is a deficient number, since it is larger than the sum of its proper divisors (1370013931).

223312244021 is a wasteful number, since it uses less digits than its factorization.

223312244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370013930.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 223312244021 its reverse (120442213322), we get a palindrome (343754457343).

The spelling of 223312244021 in words is "two hundred twenty-three billion, three hundred twelve million, two hundred forty-four thousand, twenty-one".