2001231202220 has 24 divisors (see below), whose sum is σ = 4203530749824. Its totient is φ = 800312438016.

The previous prime is 2001231202189. The next prime is 2001231202259. The reversal of 2001231202220 is 222021321002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11161517 + ... + 11339396.

It is an arithmetic number, because the mean of its divisors is an integer number (175147114576).

Almost surely, 2^{2001231202220} is an apocalyptic number.

2001231202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001231202220 is an abundant number, since it is smaller than the sum of its proper divisors (2202299547604).

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

2001231202220 is a wasteful number, since it uses less digits than its factorization.

2001231202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22505369 (or 22505367 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2001231202220 its reverse (222021321002), we get a palindrome (2223252523222).

The spelling of 2001231202220 in words is "two trillion, one billion, two hundred thirty-one million, two hundred two thousand, two hundred twenty".