221223131123 has 8 divisors (see below), whose sum is σ = 224609025696. Its totient is φ = 217846843200.

The previous prime is 221223131117. The next prime is 221223131257. The reversal of 221223131123 is 321131322122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221223131123 is a prime.

It is a super-2 number, since 2×221223131123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223131113) 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, 2355248 + ... + 2447373.

It is an arithmetic number, because the mean of its divisors is an integer number (28076128212).

Almost surely, 2^221223131123 is an apocalyptic number.

221223131123 is a deficient number, since it is larger than the sum of its proper divisors (3385894573).

221223131123 is an equidigital number, since it uses as much as digits as its factorization.

221223131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803325.

The product of its digits is 864, while the sum is 23.

Adding to 221223131123 its reverse (321131322122), we get a palindrome (542354453245).

The spelling of 221223131123 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-three".