223231331021 has 4 divisors (see below), whose sum is σ = 223400575200. Its totient is φ = 223062086844.

The previous prime is 223231330939. The next prime is 223231331033. The reversal of 223231331021 is 120133132322.

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 223231331021 - 2¹⁴ = 223231314637 is a prime.

It is a super-3 number, since 3×223231331021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223231331041) 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, 84620111 + ... + 84622748.

It is an arithmetic number, because the mean of its divisors is an integer number (55850143800).

Almost surely, 2^223231331021 is an apocalyptic number.

It is an amenable number.

223231331021 is a deficient number, since it is larger than the sum of its proper divisors (169244179).

223231331021 is a wasteful number, since it uses less digits than its factorization.

223231331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169244178.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 223231331021 its reverse (120133132322), we get a palindrome (343364463343).

The spelling of 223231331021 in words is "two hundred twenty-three billion, two hundred thirty-one million, three hundred thirty-one thousand, twenty-one".