2011020120 has 96 divisors (see below), whose sum is σ = 6541909920. Its totient is φ = 535772160.

The previous prime is 2011020113. The next prime is 2011020139. The reversal of 2011020120 is 210201102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 542112 + ... + 545808.

It is an arithmetic number, because the mean of its divisors is an integer number (68144895).

Almost surely, 2^2011020120 is an apocalyptic number.

2011020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011020120 is an abundant number, since it is smaller than the sum of its proper divisors (4530889800).

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

2011020120 is a wasteful number, since it uses less digits than its factorization.

2011020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225 (or 5218 counting only the distinct ones).

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

The square root of 2011020120 is about 44844.3989813667. The cubic root of 2011020120 is about 1262.2308928110.

Adding to 2011020120 its reverse (210201102), we get a palindrome (2221221222).

The spelling of 2011020120 in words is "two billion, eleven million, twenty thousand, one hundred twenty".