221313124123 has 16 divisors (see below), whose sum is σ = 272401327296. Its totient is φ = 175094640000.

The previous prime is 221313124099. The next prime is 221313124141. The reversal of 221313124123 is 321421313122.

221313124123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221313124123 - 2²⁹ = 220776253211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221313124223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1745373 + ... + 1867873.

It is an arithmetic number, because the mean of its divisors is an integer number (17025082956).

Almost surely, 2^221313124123 is an apocalyptic number.

221313124123 is a deficient number, since it is larger than the sum of its proper divisors (51088203173).

221313124123 is a wasteful number, since it uses less digits than its factorization.

221313124123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142374.

The product of its digits is 1728, while the sum is 25.

Adding to 221313124123 its reverse (321421313122), we get a palindrome (542734437245).

The spelling of 221313124123 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred twenty-four thousand, one hundred twenty-three".