321121413 has 18 divisors (see below), whose sum is σ = 489544614. Its totient is φ = 202811472.

The previous prime is 321121403. The next prime is 321121417. The reversal of 321121413 is 314121123.

It can be written as a sum of positive squares in only one way, i.e., 314246529 + 6874884 = 17727^2 + 2622^2 .

It is not a de Polignac number, because 321121413 - 2⁹ = 321120901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321121417) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46170 + ... + 52667.

It is an arithmetic number, because the mean of its divisors is an integer number (27196923).

Almost surely, 2^321121413 is an apocalyptic number.

It is an amenable number.

321121413 is a deficient number, since it is larger than the sum of its proper divisors (168423201).

321121413 is a wasteful number, since it uses less digits than its factorization.

321121413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98881 (or 98859 counting only the distinct ones).

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

The square root of 321121413 is about 17919.8608532544. The cubic root of 321121413 is about 684.7884426695.

Adding to 321121413 its reverse (314121123), we get a palindrome (635242536).

The spelling of 321121413 in words is "three hundred twenty-one million, one hundred twenty-one thousand, four hundred thirteen".