223121130231 has 4 divisors (see below), whose sum is σ = 297494840312. Its totient is φ = 148747420152.

The previous prime is 223121130223. The next prime is 223121130269. The reversal of 223121130231 is 132031121322.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 223121130231 - 2³ = 223121130223 is a prime.

It is a super-3 number, since 3×223121130231³ (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 junction number, because it is equal to n+sod(n) for n = 223121130198 and 223121130207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121130131) 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, 37186855036 + ... + 37186855041.

It is an arithmetic number, because the mean of its divisors is an integer number (74373710078).

Almost surely, 2^223121130231 is an apocalyptic number.

223121130231 is a deficient number, since it is larger than the sum of its proper divisors (74373710081).

223121130231 is an equidigital number, since it uses as much as digits as its factorization.

223121130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74373710080.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 223121130231 its reverse (132031121322), we get a palindrome (355152251553).

The spelling of 223121130231 in words is "two hundred twenty-three billion, one hundred twenty-one million, one hundred thirty thousand, two hundred thirty-one".