121451205413 has 16 divisors (see below), whose sum is σ = 124569221760. Its totient is φ = 118370735616.

The previous prime is 121451205331. The next prime is 121451205419. The reversal of 121451205413 is 314502154121.

It is a happy number.

It is not a de Polignac number, because 121451205413 - 2⁸ = 121451205157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121451205419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6643181 + ... + 6661437.

It is an arithmetic number, because the mean of its divisors is an integer number (7785576360).

Almost surely, 2^121451205413 is an apocalyptic number.

It is an amenable number.

121451205413 is a deficient number, since it is larger than the sum of its proper divisors (3118016347).

121451205413 is a wasteful number, since it uses less digits than its factorization.

121451205413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19276.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 121451205413 its reverse (314502154121), we get a palindrome (435953359534).

The spelling of 121451205413 in words is "one hundred twenty-one billion, four hundred fifty-one million, two hundred five thousand, four hundred thirteen".