3111121321 has 8 divisors (see below), whose sum is σ = 3878800704. Its totient is φ = 2424250320.

The previous prime is 3111121319. The next prime is 3111121331. The reversal of 3111121321 is 1231211113.

It is a happy number.

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 3111121321 - 2¹ = 3111121319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111121295 and 3111121304.

It is not an unprimeable number, because it can be changed into a prime (3111121301) 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, 20202010 + ... + 20202163.

It is an arithmetic number, because the mean of its divisors is an integer number (484850088).

Almost surely, 2^3111121321 is an apocalyptic number.

It is an amenable number.

3111121321 is a deficient number, since it is larger than the sum of its proper divisors (767679383).

3111121321 is a wasteful number, since it uses less digits than its factorization.

3111121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40404191.

The product of its digits is 36, while the sum is 16.

The square root of 3111121321 is about 55777.4266258313. The cubic root of 3111121321 is about 1459.8413102372.

Adding to 3111121321 its reverse (1231211113), we get a palindrome (4342332434).

The spelling of 3111121321 in words is "three billion, one hundred eleven million, one hundred twenty-one thousand, three hundred twenty-one".