121534353513 has 24 divisors (see below), whose sum is σ = 177069707360. Its totient is φ = 80323021440.

The previous prime is 121534353487. The next prime is 121534353517. The reversal of 121534353513 is 315353435121.

121534353513 is a `hidden beast` number, since 1 + 2 + 1 + 53 + 43 + 53 + 513 = 666.

It is not a de Polignac number, because 121534353513 - 2⁶ = 121534353449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121534353517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 794145 + ... + 934737.

Almost surely, 2^121534353513 is an apocalyptic number.

It is an amenable number.

121534353513 is a deficient number, since it is larger than the sum of its proper divisors (55535353847).

121534353513 is a wasteful number, since it uses less digits than its factorization.

121534353513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141429 (or 141426 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

Adding to 121534353513 its reverse (315353435121), we get a palindrome (436887788634).

The spelling of 121534353513 in words is "one hundred twenty-one billion, five hundred thirty-four million, three hundred fifty-three thousand, five hundred thirteen".