43121130461 has 2 divisors, whose sum is σ = 43121130462. Its totient is φ = 43121130460.

The previous prime is 43121130443. The next prime is 43121130487. The reversal of 43121130461 is 16403112134.

It is a happy number.

43121130461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (43121130487) can be obtained adding 43121130461 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42032790361 + 1088340100 = 205019^2 + 32990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43121130461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43121130461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43121130361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560565230 + 21560565231.

It is an arithmetic number, because the mean of its divisors is an integer number (21560565231).

Almost surely, 2^43121130461 is an apocalyptic number.

It is an amenable number.

43121130461 is a deficient number, since it is larger than the sum of its proper divisors (1).

43121130461 is an equidigital number, since it uses as much as digits as its factorization.

43121130461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 43121130461 its reverse (16403112134), we get a palindrome (59524242595).

The spelling of 43121130461 in words is "forty-three billion, one hundred twenty-one million, one hundred thirty thousand, four hundred sixty-one".