2011001020 has 48 divisors (see below), whose sum is σ = 4831077888. Its totient is φ = 688818240.

The previous prime is 2011000963. The next prime is 2011001033. The reversal of 2011001020 is 201001102.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 2011000994 and 2011001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150825 + ... + 163615.

It is an arithmetic number, because the mean of its divisors is an integer number (100647456).

Almost surely, 2^2011001020 is an apocalyptic number.

2011001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011001020 is an abundant number, since it is smaller than the sum of its proper divisors (2820076868).

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

2011001020 is a wasteful number, since it uses less digits than its factorization.

2011001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930 (or 13928 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2011001020 is about 44844.1860222705. The cubic root of 2011001020 is about 1262.2268967154.

Adding to 2011001020 its reverse (201001102), we get a palindrome (2212002122).

The spelling of 2011001020 in words is "two billion, eleven million, one thousand, twenty".