121304320220 has 24 divisors (see below), whose sum is σ = 255361923600. Its totient is φ = 48403089792.

The previous prime is 121304320213. The next prime is 121304320273. The reversal of 121304320220 is 22023403121.

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 = 121304320192 and 121304320201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7406510 + ... + 7422869.

It is an arithmetic number, because the mean of its divisors is an integer number (10640080150).

Almost surely, 2^121304320220 is an apocalyptic number.

121304320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121304320220 is an abundant number, since it is smaller than the sum of its proper divisors (134057603380).

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

121304320220 is a wasteful number, since it uses less digits than its factorization.

121304320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14829797 (or 14829795 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 121304320220 its reverse (22023403121), we get a palindrome (143327723341).

The spelling of 121304320220 in words is "one hundred twenty-one billion, three hundred four million, three hundred twenty thousand, two hundred twenty".