2002323121220 has 12 divisors (see below), whose sum is σ = 4204878554604. Its totient is φ = 800929248480.

The previous prime is 2002323121213. The next prime is 2002323121223. The reversal of 2002323121220 is 221213232002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 300529818436 + 1701793302784 = 548206^2 + 1304528^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 100116156061 = 2002323121220 / (2 + 0 + 0 + 2 + 3 + 2 + 3 + 1 + 2 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2002323121192 and 2002323121201.

It is not an unprimeable number, because it can be changed into a prime (2002323121223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50058078011 + ... + 50058078050.

It is an arithmetic number, because the mean of its divisors is an integer number (350406546217).

Almost surely, 2^{2002323121220} is an apocalyptic number.

2002323121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2002323121220 is an abundant number, since it is smaller than the sum of its proper divisors (2202555433384).

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

2002323121220 is a wasteful number, since it uses less digits than its factorization.

2002323121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100116156070 (or 100116156068 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 2002323121220 its reverse (221213232002), we get a palindrome (2223536353222).

The spelling of 2002323121220 in words is "two trillion, two billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty".