2002131323220 has 192 divisors, whose sum is σ = 6430343915520. Its totient is φ = 455952634368.

The previous prime is 2002131323207. The next prime is 2002131323237. The reversal of 2002131323220 is 223231312002.

It is a happy number.

It is a super-2 number, since 2×2002131323220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 145528582 + ... + 145542338.

It is an arithmetic number, because the mean of its divisors is an integer number (33491374560).

Almost surely, 2^{2002131323220} is an apocalyptic number.

2002131323220 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 2002131323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3215171957760).

2002131323220 is an abundant number, since it is smaller than the sum of its proper divisors (4428212592300).

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

2002131323220 is a wasteful number, since it uses less digits than its factorization.

2002131323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15022 (or 15020 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 2002131323220 its reverse (223231312002), we get a palindrome (2225362635222).

The spelling of 2002131323220 in words is "two trillion, two billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty".