2001002111020 has 48 divisors (see below), whose sum is σ = 4825383091200. Its totient is φ = 689340438720.

The previous prime is 2001002111011. The next prime is 2001002111021. The reversal of 2001002111020 is 201112001002.

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

It is a junction number, because it is equal to n+sod(n) for n = 2001002110988 and 2001002111006.

It is not an unprimeable number, because it can be changed into a prime (2001002111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239350140 + ... + 239358499.

It is an arithmetic number, because the mean of its divisors is an integer number (100528814400).

Almost surely, 2^{2001002111020} is an apocalyptic number.

2001002111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001002111020 is an abundant number, since it is smaller than the sum of its proper divisors (2824380980180).

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

2001002111020 is a wasteful number, since it uses less digits than its factorization.

2001002111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478708678 (or 478708676 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2001002111020 its reverse (201112001002), we get a palindrome (2202114112022).

The spelling of 2001002111020 in words is "two trillion, one billion, two million, one hundred eleven thousand, twenty".