2001220020992 has 36 divisors (see below), whose sum is σ = 3996749667120. Its totient is φ = 1000077247488.

The previous prime is 2001220020949. The next prime is 2001220021103. The reversal of 2001220020992 is 2990200221002.

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, 1599143 + ... + 2561190.

Almost surely, 2^{2001220020992} is an apocalyptic number.

It is an amenable number.

2001220020992 is a deficient number, since it is larger than the sum of its proper divisors (1995529646128).

2001220020992 is an equidigital number, since it uses as much as digits as its factorization.

2001220020992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162228 (or 4162214 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 2001220020992 its reverse (2990200221002), we get a palindrome (4991420241994).

The spelling of 2001220020992 in words is "two trillion, one billion, two hundred twenty million, twenty thousand, nine hundred ninety-two".