2001202111220 has 96 divisors (see below), whose sum is σ = 4578907656960. Its totient is φ = 730242247680.

The previous prime is 2001202111219. The next prime is 2001202111241. The reversal of 2001202111220 is 221112021002.

It is a junction number, because it is equal to n+sod(n) for n = 2001202111195 and 2001202111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49291049 + ... + 49331631.

It is an arithmetic number, because the mean of its divisors is an integer number (47696954760).

Almost surely, 2^{2001202111220} is an apocalyptic number.

2001202111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001202111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289453828480).

2001202111220 is an abundant number, since it is smaller than the sum of its proper divisors (2577705545740).

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

2001202111220 is a wasteful number, since it uses less digits than its factorization.

2001202111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42825 (or 42823 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001202111220 its reverse (221112021002), we get a palindrome (2222314132222).

The spelling of 2001202111220 in words is "two trillion, one billion, two hundred two million, one hundred eleven thousand, two hundred twenty".