2001220021120 has 32 divisors (see below), whose sum is σ = 4784166614520. Its totient is φ = 800488008192.

The previous prime is 2001220021111. The next prime is 2001220021133. The reversal of 2001220021120 is 211200221002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2001220021120.

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, 1563452502 + ... + 1563453781.

Almost surely, 2^{2001220021120} is an apocalyptic number.

2001220021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001220021120 is an abundant number, since it is smaller than the sum of its proper divisors (2782946593400).

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

2001220021120 is an equidigital number, since it uses as much as digits as its factorization.

2001220021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126906302 (or 3126906290 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001220021120 its reverse (211200221002), we get a palindrome (2212420242122).

The spelling of 2001220021120 in words is "two trillion, one billion, two hundred twenty million, twenty-one thousand, one hundred twenty".