321121356 has 96 divisors (see below), whose sum is σ = 812851200. Its totient is φ = 98360640.

The previous prime is 321121351. The next prime is 321121357. The reversal of 321121356 is 653121123.

321121356 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 1343485 + ... + 1343723.

It is an arithmetic number, because the mean of its divisors is an integer number (8467200).

Almost surely, 2^321121356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321121356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406425600).

321121356 is an abundant number, since it is smaller than the sum of its proper divisors (491729844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321121356 is a wasteful number, since it uses less digits than its factorization.

321121356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 417 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 321121356 is about 17919.8592628402. The cubic root of 321121356 is about 684.7884021522.

Adding to 321121356 its reverse (653121123), we get a palindrome (974242479).

The spelling of 321121356 in words is "three hundred twenty-one million, one hundred twenty-one thousand, three hundred fifty-six".