121203043120 has 80 divisors (see below), whose sum is σ = 291667671360. Its totient is φ = 46784812032.

The previous prime is 121203043111. The next prime is 121203043133. The reversal of 121203043120 is 21340302121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 4750237 + ... + 4775683.

It is an arithmetic number, because the mean of its divisors is an integer number (3645845892).

Almost surely, 2^121203043120 is an apocalyptic number.

121203043120 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 121203043120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145833835680).

121203043120 is an abundant number, since it is smaller than the sum of its proper divisors (170464628240).

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

121203043120 is a wasteful number, since it uses less digits than its factorization.

121203043120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27542 (or 27536 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121203043120 its reverse (21340302121), we get a palindrome (142543345241).

The spelling of 121203043120 in words is "one hundred twenty-one billion, two hundred three million, forty-three thousand, one hundred twenty".