3381172021 has 2 divisors, whose sum is σ = 3381172022. Its totient is φ = 3381172020.

The previous prime is 3381172009. The next prime is 3381172027. The reversal of 3381172021 is 1202711833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1943928100 + 1437243921 = 44090^2 + 37911^2 .

It is an emirp because it is prime and its reverse (1202711833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3381172021 - 2¹⁹ = 3380647733 is a prime.

It is a super-2 number, since 2×3381172021² = 22864648471186448882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3381172027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1690586010 + 1690586011.

It is an arithmetic number, because the mean of its divisors is an integer number (1690586011).

Almost surely, 2^3381172021 is an apocalyptic number.

It is an amenable number.

3381172021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3381172021 is an equidigital number, since it uses as much as digits as its factorization.

3381172021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 3381172021 is about 58147.8462283858. The cubic root of 3381172021 is about 1500.9138166612.

Adding to 3381172021 its reverse (1202711833), we get a palindrome (4583883854).

The spelling of 3381172021 in words is "three billion, three hundred eighty-one million, one hundred seventy-two thousand, twenty-one".