20030121304420 has 48 divisors (see below), whose sum is σ = 42282819856368. Its totient is φ = 7970229780480.

The previous prime is 20030121304397. The next prime is 20030121304447. The reversal of 20030121304420 is 2440312103002.

It can be written as a sum of positive squares in 8 ways, for example, as 1289464718116 + 18740656586304 = 1135546^2 + 4329048^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20030121304391 and 20030121304400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119116642 + ... + 119284678.

It is an arithmetic number, because the mean of its divisors is an integer number (880892080341).

Almost surely, 2^{20030121304420} is an apocalyptic number.

20030121304420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20030121304420 is an abundant number, since it is smaller than the sum of its proper divisors (22252698551948).

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

20030121304420 is a wasteful number, since it uses less digits than its factorization.

20030121304420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199120 (or 199118 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20030121304420 its reverse (2440312103002), we get a palindrome (22470433407422).

The spelling of 20030121304420 in words is "twenty trillion, thirty billion, one hundred twenty-one million, three hundred four thousand, four hundred twenty".