3141720221 has 2 divisors, whose sum is σ = 3141720222. Its totient is φ = 3141720220.

The previous prime is 3141720187. The next prime is 3141720287. The reversal of 3141720221 is 1220271413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1768202500 + 1373517721 = 42050^2 + 37061^2 .

It is a cyclic number.

It is not a de Polignac number, because 3141720221 - 2⁶ = 3141720157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3141720721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1570860110 + 1570860111.

It is an arithmetic number, because the mean of its divisors is an integer number (1570860111).

Almost surely, 2^3141720221 is an apocalyptic number.

It is an amenable number.

3141720221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3141720221 is an equidigital number, since it uses as much as digits as its factorization.

3141720221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 3141720221 is about 56051.0501328922. The cubic root of 3141720221 is about 1464.6117110169.

Adding to 3141720221 its reverse (1220271413), we get a palindrome (4361991634).

The spelling of 3141720221 in words is "three billion, one hundred forty-one million, seven hundred twenty thousand, two hundred twenty-one".