2001111111020 has 24 divisors (see below), whose sum is σ = 4802666666784. Its totient is φ = 686095238016.

The previous prime is 2001111111019. The next prime is 2001111111031. The reversal of 2001111111020 is 201111111002.

It is a junction number, because it is equal to n+sod(n) for n = 2001111110992 and 2001111111010.

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, 7146825257 + ... + 7146825536.

It is an arithmetic number, because the mean of its divisors is an integer number (200111111116).

Almost surely, 2^{2001111111020} is an apocalyptic number.

2001111111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001111111020 is an abundant number, since it is smaller than the sum of its proper divisors (2801555555764).

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

2001111111020 is a wasteful number, since it uses less digits than its factorization.

2001111111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14293650809 (or 14293650807 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2001111111020 its reverse (201111111002), we get a palindrome (2202222222022).

It can be divided in two parts, 200111 and 1111020, that added together give a palindrome (1311131).

The spelling of 2001111111020 in words is "two trillion, one billion, one hundred eleven million, one hundred eleven thousand, twenty".