221223144126 has 32 divisors (see below), whose sum is σ = 452826316800. Its totient is φ = 72011729664.

The previous prime is 221223144067. The next prime is 221223144127. The reversal of 221223144126 is 621441322122.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221223144093 and 221223144102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221223144127) 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, 1246275 + ... + 1412673.

It is an arithmetic number, because the mean of its divisors is an integer number (14150822400).

Almost surely, 2^221223144126 is an apocalyptic number.

221223144126 is an abundant number, since it is smaller than the sum of its proper divisors (231603172674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221223144126 is a wasteful number, since it uses less digits than its factorization.

221223144126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171600.

The product of its digits is 9216, while the sum is 30.

Adding to 221223144126 its reverse (621441322122), we get a palindrome (842664466248).

The spelling of 221223144126 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred forty-four thousand, one hundred twenty-six".