2001000211020 has 144 divisors (see below), whose sum is σ = 6390697098240. Its totient is φ = 505394114688.

The previous prime is 2001000211003. The next prime is 2001000211069. The reversal of 2001000211020 is 201120001002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2001000210993 and 2001000211011.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14579557 + ... + 14716163.

It is an arithmetic number, because the mean of its divisors is an integer number (44379840960).

Almost surely, 2^{2001000211020} is an apocalyptic number.

2001000211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001000211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3195348549120).

2001000211020 is an abundant number, since it is smaller than the sum of its proper divisors (4389696887220).

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

2001000211020 is a wasteful number, since it uses less digits than its factorization.

2001000211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140924 (or 140919 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2001000211020 its reverse (201120001002), we get a palindrome (2202120212022).

The spelling of 2001000211020 in words is "two trillion, one billion, two hundred eleven thousand, twenty".