2001211310220 has 96 divisors (see below), whose sum is σ = 5632862860800. Its totient is φ = 530856775680.

The previous prime is 2001211310191. The next prime is 2001211310221. The reversal of 2001211310220 is 220131121002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2001211310220.

It is not an unprimeable number, because it can be changed into a prime (2001211310221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8804929 + ... + 9029351.

It is an arithmetic number, because the mean of its divisors is an integer number (58675654800).

Almost surely, 2^{2001211310220} is an apocalyptic number.

2001211310220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001211310220 is an abundant number, since it is smaller than the sum of its proper divisors (3631651550580).

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

2001211310220 is a wasteful number, since it uses less digits than its factorization.

2001211310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225215 (or 225213 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2001211310220 its reverse (220131121002), we get a palindrome (2221342431222).

The spelling of 2001211310220 in words is "two trillion, one billion, two hundred eleven million, three hundred ten thousand, two hundred twenty".