123121313031211 has 8 divisors (see below), whose sum is σ = 134314383571200. Its totient is φ = 111928279808040.

The previous prime is 123121313031187. The next prime is 123121313031239. The reversal of 123121313031211 is 112130313121321.

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 123121313031211 - 2⁹ = 123121313030699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121313031011) 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, 2193231 + ... + 15844648.

It is an arithmetic number, because the mean of its divisors is an integer number (16789297946400).

Almost surely, 2^{123121313031211} is an apocalyptic number.

123121313031211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123121313031211 is a deficient number, since it is larger than the sum of its proper divisors (11193070539989).

123121313031211 is a wasteful number, since it uses less digits than its factorization.

123121313031211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18658409.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 123121313031211 its reverse (112130313121321), we get a palindrome (235251626152532).

The spelling of 123121313031211 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, three hundred thirteen million, thirty-one thousand, two hundred eleven".