2011111020020 has 24 divisors (see below), whose sum is σ = 4223968222824. Its totient is φ = 804323440256.

The previous prime is 2011111020007. The next prime is 2011111020031. The reversal of 2011111020020 is 200201111102.

It can be written as a sum of positive squares in 4 ways, for example, as 168804296164 + 1842306723856 = 410858^2 + 1357316^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2011111019983 and 2011111020010.

It is a congruent number.

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, 7424099 + ... + 7690218.

It is an arithmetic number, because the mean of its divisors is an integer number (175998675951).

Almost surely, 2^{2011111020020} is an apocalyptic number.

2011111020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011111020020 is an abundant number, since it is smaller than the sum of its proper divisors (2212857202804).

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

2011111020020 is a wasteful number, since it uses less digits than its factorization.

2011111020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15120979 (or 15120977 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2011111020020 its reverse (200201111102), we get a palindrome (2211312131122).

The spelling of 2011111020020 in words is "two trillion, eleven billion, one hundred eleven million, twenty thousand, twenty".