221223121322123 has 16 divisors (see below), whose sum is σ = 223148353407840. Its totient is φ = 219308095266816.

The previous prime is 221223121322117. The next prime is 221223121322167. The reversal of 221223121322123 is 321223121322122.

It is a cyclic number.

It is not a de Polignac number, because 221223121322123 - 2⁶ = 221223121322059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223121222123) 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 15 ways as a sum of consecutive naturals, for example, 56058413 + ... + 59874801.

It is an arithmetic number, because the mean of its divisors is an integer number (13946772087990).

Almost surely, 2^{221223121322123} is an apocalyptic number.

221223121322123 is a deficient number, since it is larger than the sum of its proper divisors (1925232085717).

221223121322123 is a wasteful number, since it uses less digits than its factorization.

221223121322123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817726.

The product of its digits is 6912, while the sum is 29.

Adding to 221223121322123 its reverse (321223121322122), we get a palindrome (542446242644245).

Subtracting 221223121322123 from its reverse (321223121322122), we obtain a palindrome (99999999999999).

The spelling of 221223121322123 in words is "two hundred twenty-one trillion, two hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred twenty-three".