123211132112121 has 8 divisors (see below), whose sum is σ = 164281593549984. Its totient is φ = 82140712707840.

The previous prime is 123211132112113. The next prime is 123211132112141. The reversal of 123211132112121 is 121211231112321.

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

It is not a de Polignac number, because 123211132112121 - 2³ = 123211132112113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123211132112091 and 123211132112100.

It is not an unprimeable number, because it can be changed into a prime (123211132112141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2877096 + ... + 15959321.

It is an arithmetic number, because the mean of its divisors is an integer number (20535199193748).

Almost surely, 2^{123211132112121} is an apocalyptic number.

It is an amenable number.

123211132112121 is a deficient number, since it is larger than the sum of its proper divisors (41070461437863).

123211132112121 is a wasteful number, since it uses less digits than its factorization.

123211132112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21016791.

The product of its digits is 288, while the sum is 24.

Adding to 123211132112121 its reverse (121211231112321), we get a palindrome (244422363224442).

The spelling of 123211132112121 in words is "one hundred twenty-three trillion, two hundred eleven billion, one hundred thirty-two million, one hundred twelve thousand, one hundred twenty-one".