221043110123 has 12 divisors (see below), whose sum is σ = 246947777664. Its totient is φ = 197654041200.

The previous prime is 221043110087. The next prime is 221043110137. The reversal of 221043110123 is 321011340122.

It is not a de Polignac number, because 221043110123 - 2¹² = 221043106027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221043110095 and 221043110104.

It is not an unprimeable number, because it can be changed into a prime (221043112123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14966411 + ... + 14981172.

It is an arithmetic number, because the mean of its divisors is an integer number (20578981472).

Almost surely, 2^221043110123 is an apocalyptic number.

221043110123 is a deficient number, since it is larger than the sum of its proper divisors (25904667541).

221043110123 is a wasteful number, since it uses less digits than its factorization.

221043110123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29947666 (or 29947655 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221043110123 its reverse (321011340122), we get a palindrome (542054450245).

The spelling of 221043110123 in words is "two hundred twenty-one billion, forty-three million, one hundred ten thousand, one hundred twenty-three".