3128221141 has 2 divisors, whose sum is σ = 3128221142. Its totient is φ = 3128221140.

The previous prime is 3128221133. The next prime is 3128221169. The reversal of 3128221141 is 1411228213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3128053041 + 168100 = 55929^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128221141 - 2³ = 3128221133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3128221171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564110570 + 1564110571.

It is an arithmetic number, because the mean of its divisors is an integer number (1564110571).

Almost surely, 2^3128221141 is an apocalyptic number.

It is an amenable number.

3128221141 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128221141 is an equidigital number, since it uses as much as digits as its factorization.

3128221141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 3128221141 is about 55930.5027780012. The cubic root of 3128221141 is about 1462.5110258598.

Adding to 3128221141 its reverse (1411228213), we get a palindrome (4539449354).

The spelling of 3128221141 in words is "three billion, one hundred twenty-eight million, two hundred twenty-one thousand, one hundred forty-one".