221010100123 has 8 divisors (see below), whose sum is σ = 221177918016. Its totient is φ = 220842350400.

The previous prime is 221010100099. The next prime is 221010100211. The reversal of 221010100123 is 321001010122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010100123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010100723) 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, 7750590 + ... + 7779052.

It is an arithmetic number, because the mean of its divisors is an integer number (27647239752).

Almost surely, 2^221010100123 is an apocalyptic number.

221010100123 is a deficient number, since it is larger than the sum of its proper divisors (167817893).

221010100123 is a wasteful number, since it uses less digits than its factorization.

221010100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34085.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 221010100123 its reverse (321001010122), we get a palindrome (542011110245).

Subtracting 221010100123 from its reverse (321001010122), we obtain a palindrome (99990909999).

The spelling of 221010100123 in words is "two hundred twenty-one billion, ten million, one hundred thousand, one hundred twenty-three".