221321123093 has 16 divisors (see below), whose sum is σ = 259282404864. Its totient is φ = 184952077440.

The previous prime is 221321123087. The next prime is 221321123117. The reversal of 221321123093 is 390321123122.

It is a cyclic number.

It is not a de Polignac number, because 221321123093 - 2²⁰ = 221320074517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321123053) 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, 167471 + ... + 686067.

It is an arithmetic number, because the mean of its divisors is an integer number (16205150304).

Almost surely, 2^221321123093 is an apocalyptic number.

It is an amenable number.

221321123093 is a deficient number, since it is larger than the sum of its proper divisors (37961281771).

221321123093 is a wasteful number, since it uses less digits than its factorization.

221321123093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520132.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 221321123093 its sum of digits (29), we get a palindrome (221321123122).

The spelling of 221321123093 in words is "two hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, ninety-three".