121321103340 has 144 divisors (see below), whose sum is σ = 355477088736. Its totient is φ = 30913766400.

The previous prime is 121321103339. The next prime is 121321103353. The reversal of 121321103340 is 43301123121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54623430 + ... + 54625650.

It is an arithmetic number, because the mean of its divisors is an integer number (2468590894).

Almost surely, 2^121321103340 is an apocalyptic number.

121321103340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121321103340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177738544368).

121321103340 is an abundant number, since it is smaller than the sum of its proper divisors (234155985396).

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

121321103340 is a wasteful number, since it uses less digits than its factorization.

121321103340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121321103340 its reverse (43301123121), we get a palindrome (164622226461).

The spelling of 121321103340 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred three thousand, three hundred forty".