2003213121000 has 256 divisors, whose sum is σ = 7692339432960. Its totient is φ = 422655897600.

The previous prime is 2003213120989. The next prime is 2003213121001. The reversal of 2003213121000 is 1213123002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (2003213121001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3395889 + ... + 3941888.

It is an arithmetic number, because the mean of its divisors is an integer number (30048200910).

Almost surely, 2^{2003213121000} is an apocalyptic number.

2003213121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2003213121000 is an abundant number, since it is smaller than the sum of its proper divisors (5689126311960).

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

2003213121000 is a wasteful number, since it uses less digits than its factorization.

2003213121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337821 (or 7337807 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 2003213121000 its reverse (1213123002), we get a palindrome (2004426244002).

The spelling of 2003213121000 in words is "two trillion, three billion, two hundred thirteen million, one hundred twenty-one thousand".