2001122020000 has 120 divisors (see below), whose sum is σ = 5212653007716. Its totient is φ = 753363456000.

The previous prime is 2001122019997. The next prime is 2001122020043. The reversal of 2001122020000 is 202211002.

It can be written as a sum of positive squares in 10 ways, for example, as 108076816 + 2001013943184 = 10396^2 + 1414572^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2602827 + ... + 3282826.

Almost surely, 2^{2001122020000} is an apocalyptic number.

2001122020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001122020000 is an abundant number, since it is smaller than the sum of its proper divisors (3211530987716).

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

2001122020000 is an equidigital number, since it uses as much as digits as its factorization.

2001122020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885700 (or 5885677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2001122020000 its reverse (202211002), we get a palindrome (2001324231002).

The spelling of 2001122020000 in words is "two trillion, one billion, one hundred twenty-two million, twenty thousand".