221101100023123 has 16 divisors (see below), whose sum is σ = 240270397757440. Its totient is φ = 202686432580800.

The previous prime is 221101100023093. The next prime is 221101100023151. The reversal of 221101100023123 is 321320001101122.

221101100023123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221101100023123 - 2²⁹ = 221100563152211 is a prime.

It is a super-2 number, since 2×221101100023123² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221101100023123.

It is not an unprimeable number, because it can be changed into a prime (221101100023163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13582215 + ... + 25033552.

It is an arithmetic number, because the mean of its divisors is an integer number (15016899859840).

Almost surely, 2^{221101100023123} is an apocalyptic number.

221101100023123 is a deficient number, since it is larger than the sum of its proper divisors (19169297734317).

221101100023123 is a wasteful number, since it uses less digits than its factorization.

221101100023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38625538.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221101100023123 its reverse (321320001101122), we get a palindrome (542421101124245).

The spelling of 221101100023123 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred million, twenty-three thousand, one hundred twenty-three".