3313131421 has 2 divisors, whose sum is σ = 3313131422. Its totient is φ = 3313131420.

The previous prime is 3313131407. The next prime is 3313131443. The reversal of 3313131421 is 1241313133.

It is an a-pointer prime, because the next prime (3313131443) can be obtained adding 3313131421 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3151587321 + 161544100 = 56139^2 + 12710^2 .

It is an emirp because it is prime and its reverse (1241313133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3313131421 - 2¹¹ = 3313129373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3313131392 and 3313131401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3313131401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1656565710 + 1656565711.

It is an arithmetic number, because the mean of its divisors is an integer number (1656565711).

Almost surely, 2^3313131421 is an apocalyptic number.

It is an amenable number.

3313131421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3313131421 is an equidigital number, since it uses as much as digits as its factorization.

3313131421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 3313131421 is about 57559.8073398444. The cubic root of 3313131421 is about 1490.7777002529. Note that the first 4 decimals are identical.

Adding to 3313131421 its reverse (1241313133), we get a palindrome (4554444554).

The spelling of 3313131421 in words is "three billion, three hundred thirteen million, one hundred thirty-one thousand, four hundred twenty-one".