2003121131220 has 72 divisors (see below), whose sum is σ = 6628509931680. Its totient is φ = 485605122240.

The previous prime is 2003121131213. The next prime is 2003121131293. The reversal of 2003121131220 is 221311213002.

2003121131220 is a `hidden beast` number, since 2 + 0 + 0 + 312 + 1 + 131 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2003121131193 and 2003121131202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505836690 + ... + 505840649.

It is an arithmetic number, because the mean of its divisors is an integer number (92062637940).

Almost surely, 2^{2003121131220} is an apocalyptic number.

2003121131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2003121131220 is an abundant number, since it is smaller than the sum of its proper divisors (4625388800460).

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

2003121131220 is a wasteful number, since it uses less digits than its factorization.

2003121131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011677365 (or 1011677360 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2003121131220 its reverse (221311213002), we get a palindrome (2224432344222).

The spelling of 2003121131220 in words is "two trillion, three billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty".