2011021012 has 96 divisors (see below), whose sum is σ = 4740390144. Its totient is φ = 720921600.

The previous prime is 2011020989. The next prime is 2011021043. The reversal of 2011021012 is 2101201102.

It is a self number, because there is not a number n which added to its sum of digits gives 2011021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1685088 + ... + 1686280.

It is an arithmetic number, because the mean of its divisors is an integer number (49379064).

Almost surely, 2^2011021012 is an apocalyptic number.

2011021012 is a gapful number since it is divisible by the number (22) 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 2011021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2370195072).

2011021012 is an abundant number, since it is smaller than the sum of its proper divisors (2729369132).

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

2011021012 is a wasteful number, since it uses less digits than its factorization.

2011021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2011021012 is about 44844.4089268662. The cubic root of 2011021012 is about 1262.2310794344.

Adding to 2011021012 its reverse (2101201102), we get a palindrome (4112222114).

The spelling of 2011021012 in words is "two billion, eleven million, twenty-one thousand, twelve".