321121331 has 8 divisors (see below), whose sum is σ = 336938784. Its totient is φ = 305458560.

The previous prime is 321121309. The next prime is 321121351. The reversal of 321121331 is 133121123.

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 321121331 - 2¹⁰ = 321120307 is a prime.

It is a super-2 number, since 2×321121331² = 206237818446423122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321121351) 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, 34406 + ... + 42731.

It is an arithmetic number, because the mean of its divisors is an integer number (42117348).

Almost surely, 2^321121331 is an apocalyptic number.

321121331 is a deficient number, since it is larger than the sum of its proper divisors (15817453).

321121331 is a wasteful number, since it uses less digits than its factorization.

321121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77341.

The product of its digits is 108, while the sum is 17.

The square root of 321121331 is about 17919.8585652901. The cubic root of 321121331 is about 684.7883843815.

Adding to 321121331 its reverse (133121123), we get a palindrome (454242454).

It can be divided in two parts, 3211 and 21331, that added together give a palindrome (24542).

The spelling of 321121331 in words is "three hundred twenty-one million, one hundred twenty-one thousand, three hundred thirty-one".