2221121321223 has 64 divisors (see below), whose sum is σ = 3629514562560. Its totient is φ = 1181181560832.

The previous prime is 2221121321219. The next prime is 2221121321233. The reversal of 2221121321223 is 3221231211222.

It is not a de Polignac number, because 2221121321223 - 2² = 2221121321219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221121321193 and 2221121321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121321233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1950415 + ... + 2871647.

It is an arithmetic number, because the mean of its divisors is an integer number (56711165040).

Almost surely, 2^{2221121321223} is an apocalyptic number.

2221121321223 is a deficient number, since it is larger than the sum of its proper divisors (1408393241337).

2221121321223 is a wasteful number, since it uses less digits than its factorization.

2221121321223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921416.

The product of its digits is 1152, while the sum is 24.

Adding to 2221121321223 its reverse (3221231211222), we get a palindrome (5442352532445).

The spelling of 2221121321223 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty-three".