3121130641 has 4 divisors (see below), whose sum is σ = 3141010612. Its totient is φ = 3101250672.

The previous prime is 3121130633. The next prime is 3121130651. The reversal of 3121130641 is 1460311213.

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 1875323025 + 1245807616 = 43305^2 + 35296^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121130641 - 2³ = 3121130633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121130651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9939750 + ... + 9940063.

It is an arithmetic number, because the mean of its divisors is an integer number (785252653).

Almost surely, 2^3121130641 is an apocalyptic number.

It is an amenable number.

3121130641 is a deficient number, since it is larger than the sum of its proper divisors (19879971).

3121130641 is a wasteful number, since it uses less digits than its factorization.

3121130641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19879970.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 3121130641 is about 55867.0801187963. The cubic root of 3121130641 is about 1461.4052025868.

Adding to 3121130641 its reverse (1460311213), we get a palindrome (4581441854).

The spelling of 3121130641 in words is "three billion, one hundred twenty-one million, one hundred thirty thousand, six hundred forty-one".