4012873121 has 2 divisors, whose sum is σ = 4012873122. Its totient is φ = 4012873120.

The previous prime is 4012873097. The next prime is 4012873159. The reversal of 4012873121 is 1213782104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2898314896 + 1114558225 = 53836^2 + 33385^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012873121 - 2¹⁸ = 4012610977 is a prime.

It is a super-2 number, since 2×4012873121² = 32206301370488561282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4012873721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006436560 + 2006436561.

It is an arithmetic number, because the mean of its divisors is an integer number (2006436561).

Almost surely, 2^4012873121 is an apocalyptic number.

It is an amenable number.

4012873121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012873121 is an equidigital number, since it uses as much as digits as its factorization.

4012873121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 4012873121 is about 63347.2424103844. The cubic root of 4012873121 is about 1589.1021289085.

The spelling of 4012873121 in words is "four billion, twelve million, eight hundred seventy-three thousand, one hundred twenty-one".