2002312123220 has 24 divisors (see below), whose sum is σ = 4204883987304. Its totient is φ = 800919415296.

The previous prime is 2002312123199. The next prime is 2002312123261. The reversal of 2002312123220 is 223212132002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 934880139664 + 1067431983556 = 966892^2 + 1033166^2 .

It is a super-3 number, since 3×2002312123220³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2002312123192 and 2002312123201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4092824 + ... + 4555856.

It is an arithmetic number, because the mean of its divisors is an integer number (175203499471).

Almost surely, 2^{2002312123220} is an apocalyptic number.

2002312123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2002312123220 is an abundant number, since it is smaller than the sum of its proper divisors (2202571864084).

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

2002312123220 is a wasteful number, since it uses less digits than its factorization.

2002312123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679259 (or 679257 counting only the distinct ones).

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

Adding to 2002312123220 its reverse (223212132002), we get a palindrome (2225524255222).

The spelling of 2002312123220 in words is "two trillion, two billion, three hundred twelve million, one hundred twenty-three thousand, two hundred twenty".