2001100020012 has 24 divisors (see below), whose sum is σ = 5188037089200. Its totient is φ = 667033339968.

The previous prime is 2001100019983. The next prime is 2001100020097. The reversal of 2001100020012 is 2100200011002.

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 = 2001100019976 and 2001100020003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9264351837 + ... + 9264352052.

It is an arithmetic number, because the mean of its divisors is an integer number (216168212050).

Almost surely, 2^{2001100020012} is an apocalyptic number.

It is an amenable number.

2001100020012 is an abundant number, since it is smaller than the sum of its proper divisors (3186937069188).

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

2001100020012 is a wasteful number, since it uses less digits than its factorization.

2001100020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18528703902 (or 18528703894 counting only the distinct ones).

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

Adding to 2001100020012 its reverse (2100200011002), we get a palindrome (4101300031014).

The spelling of 2001100020012 in words is "two trillion, one billion, one hundred million, twenty thousand, twelve".