121142311321 has 4 divisors (see below), whose sum is σ = 128268329652. Its totient is φ = 114016292992.

The previous prime is 121142311243. The next prime is 121142311397. The reversal of 121142311321 is 123113241121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105576255625 + 15566055696 = 324925^2 + 124764^2 .

It is a cyclic number.

It is not a de Polignac number, because 121142311321 - 2¹⁵ = 121142278553 is a prime.

It is a super-3 number, since 3×121142311321³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121142311292 and 121142311301.

It is not an unprimeable number, because it can be changed into a prime (121142311421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563009140 + ... + 3563009173.

It is an arithmetic number, because the mean of its divisors is an integer number (32067082413).

Almost surely, 2^121142311321 is an apocalyptic number.

It is an amenable number.

121142311321 is a deficient number, since it is larger than the sum of its proper divisors (7126018331).

121142311321 is an equidigital number, since it uses as much as digits as its factorization.

121142311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7126018330.

The product of its digits is 288, while the sum is 22.

Adding to 121142311321 its reverse (123113241121), we get a palindrome (244255552442).

The spelling of 121142311321 in words is "one hundred twenty-one billion, one hundred forty-two million, three hundred eleven thousand, three hundred twenty-one".