121335105320 has 64 divisors (see below), whose sum is σ = 320731971840. Its totient is φ = 40727865600.

The previous prime is 121335105319. The next prime is 121335105343. The reversal of 121335105320 is 23501533121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 121335105320.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10600496 + ... + 10611935.

It is an arithmetic number, because the mean of its divisors is an integer number (5011437060).

Almost surely, 2^121335105320 is an apocalyptic number.

121335105320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121335105320 is an abundant number, since it is smaller than the sum of its proper divisors (199396866520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121335105320 is a wasteful number, since it uses less digits than its factorization.

121335105320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21212466 (or 21212462 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 121335105320 its reverse (23501533121), we get a palindrome (144836638441).

The spelling of 121335105320 in words is "one hundred twenty-one billion, three hundred thirty-five million, one hundred five thousand, three hundred twenty".