221100132123 has 24 divisors (see below), whose sum is σ = 355793321520. Its totient is φ = 131369837760.

The previous prime is 221100132089. The next prime is 221100132131. The reversal of 221100132123 is 321231001122.

221100132123 is a `hidden beast` number, since 221 + 100 + 1 + 321 + 23 = 666.

It is not a de Polignac number, because 221100132123 - 2⁶ = 221100132059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221100132096 and 221100132105.

It is not an unprimeable number, because it can be changed into a prime (221100132133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32578413 + ... + 32585198.

It is an arithmetic number, because the mean of its divisors is an integer number (14824721730).

Almost surely, 2^221100132123 is an apocalyptic number.

221100132123 is a deficient number, since it is larger than the sum of its proper divisors (134693189397).

221100132123 is a wasteful number, since it uses less digits than its factorization.

221100132123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65163659 (or 65163656 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221100132123 its reverse (321231001122), we get a palindrome (542331133245).

The spelling of 221100132123 in words is "two hundred twenty-one billion, one hundred million, one hundred thirty-two thousand, one hundred twenty-three".