221102200123 has 4 divisors (see below), whose sum is σ = 252688228720. Its totient is φ = 189516171528.

The previous prime is 221102200117. The next prime is 221102200129. The reversal of 221102200123 is 321002201122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (221102200117) and next prime (221102200129).

It is a cyclic number.

It is not a de Polignac number, because 221102200123 - 2⁹ = 221102199611 is a prime.

It is a super-2 number, since 2×221102200123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221102200097 and 221102200106.

It is not an unprimeable number, because it can be changed into a prime (221102200129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15793014288 + ... + 15793014301.

It is an arithmetic number, because the mean of its divisors is an integer number (63172057180).

Almost surely, 2^221102200123 is an apocalyptic number.

221102200123 is a deficient number, since it is larger than the sum of its proper divisors (31586028597).

221102200123 is an equidigital number, since it uses as much as digits as its factorization.

221102200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31586028596.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221102200123 its reverse (321002201122), we get a palindrome (542104401245).

Subtracting 221102200123 from its reverse (321002201122), we obtain a palindrome (99900000999).

The spelling of 221102200123 in words is "two hundred twenty-one billion, one hundred two million, two hundred thousand, one hundred twenty-three".