221011110123 has 8 divisors (see below), whose sum is σ = 307493718528. Its totient is φ = 140934620904.

The previous prime is 221011110083. The next prime is 221011110161. The reversal of 221011110123 is 321011110122.

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

It is not a de Polignac number, because 221011110123 - 2⁶ = 221011110059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221011114123) 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, 1601529715 + ... + 1601529852.

It is an arithmetic number, because the mean of its divisors is an integer number (38436714816).

Almost surely, 2^221011110123 is an apocalyptic number.

221011110123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221011110123 is a deficient number, since it is larger than the sum of its proper divisors (86482608405).

221011110123 is a wasteful number, since it uses less digits than its factorization.

221011110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203059593.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 221011110123 its reverse (321011110122), we get a palindrome (542022220245).

Subtracting 221011110123 from its reverse (321011110122), we obtain a palindrome (99999999999).

The spelling of 221011110123 in words is "two hundred twenty-one billion, eleven million, one hundred ten thousand, one hundred twenty-three".