121535544343 has 16 divisors (see below), whose sum is σ = 128587002880. Its totient is φ = 114550231104.

The previous prime is 121535544341. The next prime is 121535544349. The reversal of 121535544343 is 343445535121.

It is a cyclic number.

It is not a de Polignac number, because 121535544343 - 2¹ = 121535544341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121535544296 and 121535544305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121535544341) 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, 7419280 + ... + 7435642.

It is an arithmetic number, because the mean of its divisors is an integer number (8036687680).

Almost surely, 2^121535544343 is an apocalyptic number.

121535544343 is a deficient number, since it is larger than the sum of its proper divisors (7051458537).

121535544343 is a wasteful number, since it uses less digits than its factorization.

121535544343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18358.

The product of its digits is 432000, while the sum is 40.

The spelling of 121535544343 in words is "one hundred twenty-one billion, five hundred thirty-five million, five hundred forty-four thousand, three hundred forty-three".