2003121021320 has 32 divisors (see below), whose sum is σ = 4507159408920. Its totient is φ = 801224033280.

The previous prime is 2003121021311. The next prime is 2003121021373. The reversal of 2003121021320 is 231201213002.

It can be written as a sum of positive squares in 4 ways, for example, as 1253016061924 + 750104959396 = 1119382^2 + 866086^2 .

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, 599600 + ... + 2089440.

Almost surely, 2^{2003121021320} is an apocalyptic number.

2003121021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2003121021320 is an abundant number, since it is smaller than the sum of its proper divisors (2504038387600).

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

2003121021320 is a wasteful number, since it uses less digits than its factorization.

2003121021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523465 (or 1523461 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2003121021320 its reverse (231201213002), we get a palindrome (2234322234322).

The spelling of 2003121021320 in words is "two trillion, three billion, one hundred twenty-one million, twenty-one thousand, three hundred twenty".