121321123121 has 8 divisors (see below), whose sum is σ = 132416416224. Its totient is φ = 110236846720.

The previous prime is 121321123117. The next prime is 121321123129.

121321123121 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 121321123121 - 2² = 121321123117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121321123093 and 121321123102.

It is not an unprimeable number, because it can be changed into a prime (121321123129) 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, 2731136 + ... + 2775201.

It is an arithmetic number, because the mean of its divisors is an integer number (16552052028).

Almost surely, 2^121321123121 is an apocalyptic number.

121321123121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121321123121 is a deficient number, since it is larger than the sum of its proper divisors (11095293103).

121321123121 is a wasteful number, since it uses less digits than its factorization.

121321123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508351.

The product of its digits is 144, while the sum is 20.

It can be divided in two parts, 121321 and 123121, that added together give a palindrome (244442).

The spelling of 121321123121 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred twenty-one".