221220022123 has 8 divisors (see below), whose sum is σ = 222155111376. Its totient is φ = 220285075200.

The previous prime is 221220022099. The next prime is 221220022141. The reversal of 221220022123 is 321220022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221220022123 - 2⁵ = 221220022091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221220022123.

It is not an unprimeable number, because it can be changed into a prime (221220020123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4078008 + ... + 4131898.

It is an arithmetic number, because the mean of its divisors is an integer number (27769388922).

Almost surely, 2^221220022123 is an apocalyptic number.

221220022123 is a deficient number, since it is larger than the sum of its proper divisors (935089253).

221220022123 is a wasteful number, since it uses less digits than its factorization.

221220022123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71165.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221220022123 its reverse (321220022122), we get a palindrome (542440044245).

Subtracting 221220022123 from its reverse (321220022122), we obtain a palindrome (99999999999).

The spelling of 221220022123 in words is "two hundred twenty-one billion, two hundred twenty million, twenty-two thousand, one hundred twenty-three".