2001201220220 has 12 divisors (see below), whose sum is σ = 4202522562504. Its totient is φ = 800480488080.

The previous prime is 2001201220177. The next prime is 2001201220231. The reversal of 2001201220220 is 220221021002.

It is a junction number, because it is equal to n+sod(n) for n = 2001201220195 and 2001201220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50030030486 + ... + 50030030525.

It is an arithmetic number, because the mean of its divisors is an integer number (350210213542).

Almost surely, 2^{2001201220220} is an apocalyptic number.

2001201220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001201220220 is an abundant number, since it is smaller than the sum of its proper divisors (2201321342284).

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

2001201220220 is a wasteful number, since it uses less digits than its factorization.

2001201220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100060061020 (or 100060061018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2001201220220 its reverse (220221021002), we get a palindrome (2221422241222).

The spelling of 2001201220220 in words is "two trillion, one billion, two hundred one million, two hundred twenty thousand, two hundred twenty".