43137841121 has 2 divisors, whose sum is σ = 43137841122. Its totient is φ = 43137841120.

The previous prime is 43137841009. The next prime is 43137841133. The reversal of 43137841121 is 12114873134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43064550400 + 73290721 = 207520^2 + 8561^2 .

It is a cyclic number.

It is not a de Polignac number, because 43137841121 - 2¹⁸ = 43137578977 is a prime.

It is not a weakly prime, because it can be changed into another prime (43137841141) 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, 21568920560 + 21568920561.

It is an arithmetic number, because the mean of its divisors is an integer number (21568920561).

Almost surely, 2^43137841121 is an apocalyptic number.

It is an amenable number.

43137841121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43137841121 is an equidigital number, since it uses as much as digits as its factorization.

43137841121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The spelling of 43137841121 in words is "forty-three billion, one hundred thirty-seven million, eight hundred forty-one thousand, one hundred twenty-one".