2001321210220 has 12 divisors (see below), whose sum is σ = 4202774541504. Its totient is φ = 800528484080.

The previous prime is 2001321210211. The next prime is 2001321210233. The reversal of 2001321210220 is 220121231002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001321210194 and 2001321210203.

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 3 ways as a sum of consecutive naturals, for example, 50033030236 + ... + 50033030275.

It is an arithmetic number, because the mean of its divisors is an integer number (350231211792).

Almost surely, 2^{2001321210220} is an apocalyptic number.

2001321210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001321210220 is an abundant number, since it is smaller than the sum of its proper divisors (2201453331284).

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

2001321210220 is a wasteful number, since it uses less digits than its factorization.

2001321210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100066060520 (or 100066060518 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2001321210220 its reverse (220121231002), we get a palindrome (2221442441222).

The spelling of 2001321210220 in words is "two trillion, one billion, three hundred twenty-one million, two hundred ten thousand, two hundred twenty".