2003121131221 has 8 divisors (see below), whose sum is σ = 2409769782080. Its totient is φ = 1626594602688.

The previous prime is 2003121131213. The next prime is 2003121131293. The reversal of 2003121131221 is 1221311213002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2003121131221 - 2³ = 2003121131213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003121131621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7530530436 + ... + 7530530701.

It is an arithmetic number, because the mean of its divisors is an integer number (301221222760).

Almost surely, 2^{2003121131221} is an apocalyptic number.

It is an amenable number.

2003121131221 is a deficient number, since it is larger than the sum of its proper divisors (406648650859).

2003121131221 is a wasteful number, since it uses less digits than its factorization.

2003121131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15061061163.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2003121131221 its reverse (1221311213002), we get a palindrome (3224432344223).

The spelling of 2003121131221 in words is "two trillion, three billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-one".