121321103320 has 64 divisors (see below), whose sum is σ = 276423114240. Its totient is φ = 47915683200.

The previous prime is 121321103297. The next prime is 121321103339. The reversal of 121321103320 is 23301123121.

It is a super-2 number, since 2×121321103320² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6201955 + ... + 6221485.

It is an arithmetic number, because the mean of its divisors is an integer number (4319111160).

Almost surely, 2^121321103320 is an apocalyptic number.

121321103320 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 121321103320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138211557120).

121321103320 is an abundant number, since it is smaller than the sum of its proper divisors (155102010920).

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

121321103320 is a wasteful number, since it uses less digits than its factorization.

121321103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21496 (or 21492 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121321103320 its reverse (23301123121), we get a palindrome (144622226441).

The spelling of 121321103320 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred three thousand, three hundred twenty".