3133311221 has 4 divisors (see below), whose sum is σ = 3136117452. Its totient is φ = 3130504992.

The previous prime is 3133311151. The next prime is 3133311239. The reversal of 3133311221 is 1221133313.

3133311221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 308388721 + 2824922500 = 17561^2 + 53150^2 .

It is a cyclic number.

It is not a de Polignac number, because 3133311221 - 2¹⁸ = 3133049077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3133311193 and 3133311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3133311521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401440 + ... + 1403673.

It is an arithmetic number, because the mean of its divisors is an integer number (784029363).

Almost surely, 2^3133311221 is an apocalyptic number.

It is an amenable number.

3133311221 is a deficient number, since it is larger than the sum of its proper divisors (2806231).

3133311221 is a wasteful number, since it uses less digits than its factorization.

3133311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806230.

The product of its digits is 324, while the sum is 20.

The square root of 3133311221 is about 55975.9878965972. The cubic root of 3133311221 is about 1463.3038368296.

Adding to 3133311221 its reverse (1221133313), we get a palindrome (4354444534).

The spelling of 3133311221 in words is "three billion, one hundred thirty-three million, three hundred eleven thousand, two hundred twenty-one".