121121304045437 has 2 divisors, whose sum is σ = 121121304045438. Its totient is φ = 121121304045436.

The previous prime is 121121304045407. The next prime is 121121304045449. The reversal of 121121304045437 is 734540403121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91275744099556 + 29845559945881 = 9553834^2 + 5463109^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121304045437 - 2²⁰ = 121121302996861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121121304045437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121304045407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560652022718 + 60560652022719.

It is an arithmetic number, because the mean of its divisors is an integer number (60560652022719).

Almost surely, 2^{121121304045437} is an apocalyptic number.

It is an amenable number.

121121304045437 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121304045437 is an equidigital number, since it uses as much as digits as its factorization.

121121304045437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

Adding to 121121304045437 its reverse (734540403121121), we get a palindrome (855661707166558).

The spelling of 121121304045437 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, three hundred four million, forty-five thousand, four hundred thirty-seven".