223121210231 has 4 divisors (see below), whose sum is σ = 223157082264. Its totient is φ = 223085338200.

The previous prime is 223121210227. The next prime is 223121210237. The reversal of 223121210231 is 132012121322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132012121322 = 2 ⋅66006060661.

It is a cyclic number.

It is not a de Polignac number, because 223121210231 - 2² = 223121210227 is a prime.

It is a super-3 number, since 3×223121210231³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121210237) 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, 17926685 + ... + 17939126.

It is an arithmetic number, because the mean of its divisors is an integer number (55789270566).

Almost surely, 2^223121210231 is an apocalyptic number.

223121210231 is a deficient number, since it is larger than the sum of its proper divisors (35872033).

223121210231 is an equidigital number, since it uses as much as digits as its factorization.

223121210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35872032.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 223121210231 its reverse (132012121322), we get a palindrome (355133331553).

The spelling of 223121210231 in words is "two hundred twenty-three billion, one hundred twenty-one million, two hundred ten thousand, two hundred thirty-one".