121123113320 has 64 divisors (see below), whose sum is σ = 307554019200. Its totient is φ = 42525978880.

The previous prime is 121123113317. The next prime is 121123113347. The reversal of 121123113320 is 23311321121.

It is a happy number.

It is a super-3 number, since 3×121123113320³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121123113292 and 121123113301.

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, 4733444 + ... + 4758963.

It is an arithmetic number, because the mean of its divisors is an integer number (4805531550).

Almost surely, 2^121123113320 is an apocalyptic number.

121123113320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121123113320 is an abundant number, since it is smaller than the sum of its proper divisors (186430905880).

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

121123113320 is a wasteful number, since it uses less digits than its factorization.

121123113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492458 (or 9492454 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121123113320 its reverse (23311321121), we get a palindrome (144434434441).

The spelling of 121123113320 in words is "one hundred twenty-one billion, one hundred twenty-three million, one hundred thirteen thousand, three hundred twenty".