223221231021 has 8 divisors (see below), whose sum is σ = 297919818784. Its totient is φ = 148668398640.

The previous prime is 223221231011. The next prime is 223221231031. The reversal of 223221231021 is 120132122322.

It is an interprime number because it is at equal distance from previous prime (223221231011) and next prime (223221231031).

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

It is not a de Polignac number, because 223221231021 - 2⁵ = 223221230989 is a prime.

It is a super-3 number, since 3×223221231021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223221231011) 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, 36435271 + ... + 36441396.

It is an arithmetic number, because the mean of its divisors is an integer number (37239977348).

Almost surely, 2^223221231021 is an apocalyptic number.

It is an amenable number.

223221231021 is a deficient number, since it is larger than the sum of its proper divisors (74698587763).

223221231021 is a wasteful number, since it uses less digits than its factorization.

223221231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72877691.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 223221231021 its reverse (120132122322), we get a palindrome (343353353343).

The spelling of 223221231021 in words is "two hundred twenty-three billion, two hundred twenty-one million, two hundred thirty-one thousand, twenty-one".