3139560121 has 2 divisors, whose sum is σ = 3139560122. Its totient is φ = 3139560120.

The previous prime is 3139560107. The next prime is 3139560233. The reversal of 3139560121 is 1210659313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2981706025 + 157854096 = 54605^2 + 12564^2 .

It is a cyclic number.

It is not a de Polignac number, because 3139560121 - 2¹¹ = 3139558073 is a prime.

It is not a weakly prime, because it can be changed into another prime (3139560101) 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, 1569780060 + 1569780061.

It is an arithmetic number, because the mean of its divisors is an integer number (1569780061).

Almost surely, 2^3139560121 is an apocalyptic number.

It is an amenable number.

3139560121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3139560121 is an equidigital number, since it uses as much as digits as its factorization.

3139560121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 3139560121 is about 56031.7777783286. Note that the first 5 decimals coincide. The cubic root of 3139560121 is about 1464.2759678694.

The spelling of 3139560121 in words is "three billion, one hundred thirty-nine million, five hundred sixty thousand, one hundred twenty-one".