121213211131121 has 8 divisors (see below), whose sum is σ = 121386026389320. Its totient is φ = 121040435331072.

The previous prime is 121213211131099. The next prime is 121213211131141. The reversal of 121213211131121 is 121131112312121.

It can be written as a sum of positive squares in 4 ways, for example, as 4643163040000 + 116570048091121 = 2154800^2 + 10796761^2 .

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 121213211131121 - 2⁶ = 121213211131057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121213211131141) 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, 3713540 + ... + 16006773.

It is an arithmetic number, because the mean of its divisors is an integer number (15173253298665).

Almost surely, 2^{121213211131121} is an apocalyptic number.

It is an amenable number.

121213211131121 is a deficient number, since it is larger than the sum of its proper divisors (172815258199).

121213211131121 is an equidigital number, since it uses as much as digits as its factorization.

121213211131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19729075.

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

Adding to 121213211131121 its reverse (121131112312121), we get a palindrome (242344323443242).

The spelling of 121213211131121 in words is "one hundred twenty-one trillion, two hundred thirteen billion, two hundred eleven million, one hundred thirty-one thousand, one hundred twenty-one".