2001321103220 has 24 divisors (see below), whose sum is σ = 4204047637608. Its totient is φ = 800285904000.

The previous prime is 2001321103213. The next prime is 2001321103247. The reversal of 2001321103220 is 223011231002.

It can be written as a sum of positive squares in 4 ways, for example, as 530257763344 + 1471063339876 = 728188^2 + 1212874^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15090911 + ... + 15222950.

It is an arithmetic number, because the mean of its divisors is an integer number (175168651567).

Almost surely, 2^{2001321103220} is an apocalyptic number.

2001321103220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001321103220 is an abundant number, since it is smaller than the sum of its proper divisors (2202726534388).

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

2001321103220 is a wasteful number, since it uses less digits than its factorization.

2001321103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30317171 (or 30317169 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2001321103220 its reverse (223011231002), we get a palindrome (2224332334222).

The spelling of 2001321103220 in words is "two trillion, one billion, three hundred twenty-one million, one hundred three thousand, two hundred twenty".