121413321 has 12 divisors (see below), whose sum is σ = 176452848. Its totient is φ = 80444664.

The previous prime is 121413311. The next prime is 121413323. The reversal of 121413321 is 123314121.

It is not a de Polignac number, because 121413321 - 2¹⁰ = 121412297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121413294 and 121413303.

It is not an unprimeable number, because it can be changed into a prime (121413323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39915 + ... + 42848.

It is an arithmetic number, because the mean of its divisors is an integer number (14704404).

Almost surely, 2^121413321 is an apocalyptic number.

It is an amenable number.

121413321 is a deficient number, since it is larger than the sum of its proper divisors (55039527).

121413321 is a wasteful number, since it uses less digits than its factorization.

121413321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82932 (or 82929 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121413321 is about 11018.7713017378. The cubic root of 121413321 is about 495.1712783466.

Adding to 121413321 its reverse (123314121), we get a palindrome (244727442).

It can be divided in two parts, 1214 and 13321, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 121413321 in words is "one hundred twenty-one million, four hundred thirteen thousand, three hundred twenty-one".