221120202023123 has 6 divisors (see below), whose sum is σ = 239437851895044. Its totient is φ = 204110955713496.

The previous prime is 221120202023099. The next prime is 221120202023153. The reversal of 221120202023123 is 321320202021122.

It is a happy number.

It is not a de Polignac number, because 221120202023123 - 2²⁸ = 221119933587667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221120202023153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654201780965 + ... + 654201781302.

It is an arithmetic number, because the mean of its divisors is an integer number (39906308649174).

Almost surely, 2^{221120202023123} is an apocalyptic number.

221120202023123 is a deficient number, since it is larger than the sum of its proper divisors (18317649871921).

221120202023123 is a wasteful number, since it uses less digits than its factorization.

221120202023123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308403562293 (or 1308403562280 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221120202023123 its reverse (321320202021122), we get a palindrome (542440404044245).

The spelling of 221120202023123 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred two million, twenty-three thousand, one hundred twenty-three".