221312334123 has 12 divisors (see below), whose sum is σ = 319693974288. Its totient is φ = 147532047120.

The previous prime is 221312334119. The next prime is 221312334151. The reversal of 221312334123 is 321433213122.

221312334123 is a `hidden beast` number, since 2 + 2 + 1 + 312 + 3 + 341 + 2 + 3 = 666.

It is not a de Polignac number, because 221312334123 - 2² = 221312334119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221312339123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 643540 + ... + 925617.

It is an arithmetic number, because the mean of its divisors is an integer number (26641164524).

Almost surely, 2^221312334123 is an apocalyptic number.

221312334123 is a deficient number, since it is larger than the sum of its proper divisors (98381640165).

221312334123 is a wasteful number, since it uses less digits than its factorization.

221312334123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584834 (or 1584831 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 221312334123 its reverse (321433213122), we get a palindrome (542745547245).

The spelling of 221312334123 in words is "two hundred twenty-one billion, three hundred twelve million, three hundred thirty-four thousand, one hundred twenty-three".