221131112111123 has 8 divisors (see below), whose sum is σ = 224764874710656. Its totient is φ = 217497628944000.

The previous prime is 221131112110949. The next prime is 221131112111141. The reversal of 221131112111123 is 321111211131122.

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

It is a cyclic number.

It is not a de Polignac number, because 221131112111123 - 2³⁶ = 221062392634387 is a prime.

It is a super-2 number, since 2×221131112111123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221131112111323) 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, 68262086 + ... + 71428107.

It is an arithmetic number, because the mean of its divisors is an integer number (28095609338832).

Almost surely, 2^{221131112111123} is an apocalyptic number.

221131112111123 is a deficient number, since it is larger than the sum of its proper divisors (3633762599533).

221131112111123 is a wasteful number, since it uses less digits than its factorization.

221131112111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139716205.

The product of its digits is 144, while the sum is 23.

Adding to 221131112111123 its reverse (321111211131122), we get a palindrome (542242323242245).

The spelling of 221131112111123 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, one hundred twenty-three".