121342520343 has 16 divisors (see below), whose sum is σ = 176798918016. Its totient is φ = 73415627040.

The previous prime is 121342520339. The next prime is 121342520353. The reversal of 121342520343 is 343025243121.

It is not a de Polignac number, because 121342520343 - 2² = 121342520339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121342520343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121342520353) 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, 3112696 + ... + 3151437.

It is an arithmetic number, because the mean of its divisors is an integer number (11049932376).

Almost surely, 2^121342520343 is an apocalyptic number.

121342520343 is a deficient number, since it is larger than the sum of its proper divisors (55456397673).

121342520343 is a wasteful number, since it uses less digits than its factorization.

121342520343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264734.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 121342520343 its reverse (343025243121), we get a palindrome (464367763464).

The spelling of 121342520343 in words is "one hundred twenty-one billion, three hundred forty-two million, five hundred twenty thousand, three hundred forty-three".