223121221131 has 16 divisors (see below), whose sum is σ = 299582281728. Its totient is φ = 147704592000.

The previous prime is 223121221129. The next prime is 223121221171. The reversal of 223121221131 is 131122121322.

It is not a de Polignac number, because 223121221131 - 2¹ = 223121221129 is a prime.

It is a super-3 number, since 3×223121221131³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 223121221098 and 223121221107.

It is not an unprimeable number, because it can be changed into a prime (223121221171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078675 + ... + 1268771.

It is an arithmetic number, because the mean of its divisors is an integer number (18723892608).

Almost surely, 2^223121221131 is an apocalyptic number.

223121221131 is a deficient number, since it is larger than the sum of its proper divisors (76461060597).

223121221131 is a wasteful number, since it uses less digits than its factorization.

223121221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192842.

The product of its digits is 288, while the sum is 21.

Adding to 223121221131 its reverse (131122121322), we get a palindrome (354243342453).

The spelling of 223121221131 in words is "two hundred twenty-three billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-one".