121331200120 has 32 divisors (see below), whose sum is σ = 293994832320. Its totient is φ = 44799212160.

The previous prime is 121331200097. The next prime is 121331200129. The reversal of 121331200120 is 21002133121.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121331200094 and 121331200103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331200129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116664096 + ... + 116665135.

It is an arithmetic number, because the mean of its divisors is an integer number (9187338510).

Almost surely, 2^121331200120 is an apocalyptic number.

121331200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121331200120 is an abundant number, since it is smaller than the sum of its proper divisors (172663632200).

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

121331200120 is a wasteful number, since it uses less digits than its factorization.

121331200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233329255 (or 233329251 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121331200120 its reverse (21002133121), we get a palindrome (142333333241).

The spelling of 121331200120 in words is "one hundred twenty-one billion, three hundred thirty-one million, two hundred thousand, one hundred twenty".