2003021312220 has 144 divisors (see below), whose sum is σ = 6353697272832. Its totient is φ = 509811603840.

The previous prime is 2003021312219. The next prime is 2003021312221. The reversal of 2003021312220 is 222131203002.

2003021312220 is a `hidden beast` number, since 200 + 30 + 213 + 1 + 2 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (2003021312219) and next prime (2003021312221).

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 = 2003021312193 and 2003021312202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003021312221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1394335 + ... + 2439305.

It is an arithmetic number, because the mean of its divisors is an integer number (44122897728).

Almost surely, 2^{2003021312220} is an apocalyptic number.

2003021312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003021312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3176848636416).

2003021312220 is an abundant number, since it is smaller than the sum of its proper divisors (4350675960612).

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

2003021312220 is a wasteful number, since it uses less digits than its factorization.

2003021312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045472 (or 1045467 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 2003021312220 its reverse (222131203002), we get a palindrome (2225152515222).

The spelling of 2003021312220 in words is "two trillion, three billion, twenty-one million, three hundred twelve thousand, two hundred twenty".