121304203120 has 80 divisors (see below), whose sum is σ = 298801687968. Its totient is φ = 45640048640.

The previous prime is 121304203049. The next prime is 121304203123. The reversal of 121304203120 is 21302403121.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121304203123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2314647 + ... + 2366473.

Almost surely, 2^121304203120 is an apocalyptic number.

121304203120 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 121304203120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149400843984).

121304203120 is an abundant number, since it is smaller than the sum of its proper divisors (177497484848).

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

121304203120 is a wasteful number, since it uses less digits than its factorization.

121304203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53578 (or 53572 counting only the distinct ones).

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

Adding to 121304203120 its reverse (21302403121), we get a palindrome (142606606241).

The spelling of 121304203120 in words is "one hundred twenty-one billion, three hundred four million, two hundred three thousand, one hundred twenty".