121340422457 has 2 divisors, whose sum is σ = 121340422458. Its totient is φ = 121340422456.

The previous prime is 121340422439. The next prime is 121340422501. The reversal of 121340422457 is 754224043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108940263721 + 12400158736 = 330061^2 + 111356^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340422457 - 2³² = 117045455161 is a prime.

It is not a weakly prime, because it can be changed into another prime (121340422417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670211228 + 60670211229.

It is an arithmetic number, because the mean of its divisors is an integer number (60670211229).

Almost surely, 2^121340422457 is an apocalyptic number.

It is an amenable number.

121340422457 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340422457 is an equidigital number, since it uses as much as digits as its factorization.

121340422457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 121340422457 its reverse (754224043121), we get a palindrome (875564465578).

The spelling of 121340422457 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-two thousand, four hundred fifty-seven".