121443430457 has 2 divisors, whose sum is σ = 121443430458. Its totient is φ = 121443430456.

The previous prime is 121443430441. The next prime is 121443430483. The reversal of 121443430457 is 754034344121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79760491561 + 41682938896 = 282419^2 + 204164^2 .

It is a cyclic number.

It is not a de Polignac number, because 121443430457 - 2⁴ = 121443430441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121443430457.

It is not a weakly prime, because it can be changed into another prime (121443430487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60721715228 + 60721715229.

It is an arithmetic number, because the mean of its divisors is an integer number (60721715229).

Almost surely, 2^121443430457 is an apocalyptic number.

It is an amenable number.

121443430457 is a deficient number, since it is larger than the sum of its proper divisors (1).

121443430457 is an equidigital number, since it uses as much as digits as its factorization.

121443430457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 38.

Adding to 121443430457 its reverse (754034344121), we get a palindrome (875477774578).

The spelling of 121443430457 in words is "one hundred twenty-one billion, four hundred forty-three million, four hundred thirty thousand, four hundred fifty-seven".