203421023120 has 80 divisors (see below), whose sum is σ = 540626528640. Its totient is φ = 69730440192.

The previous prime is 203421023063. The next prime is 203421023123. The reversal of 203421023120 is 21320124302.

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

It is a super-2 number, since 2×203421023120² (a number of 23 digits) contains 22 as substring.

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 = 203421023092 and 203421023101.

It is not an unprimeable number, because it can be changed into a prime (203421023123) 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, 3001124 + ... + 3068156.

It is an arithmetic number, because the mean of its divisors is an integer number (6757831608).

Almost surely, 2^203421023120 is an apocalyptic number.

203421023120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203421023120 is an abundant number, since it is smaller than the sum of its proper divisors (337205505520).

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

203421023120 is a wasteful number, since it uses less digits than its factorization.

203421023120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72472 (or 72466 counting only the distinct ones).

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

Adding to 203421023120 its reverse (21320124302), we get a palindrome (224741147422).

The spelling of 203421023120 in words is "two hundred three billion, four hundred twenty-one million, twenty-three thousand, one hundred twenty".