2011010021 has 8 divisors (see below), whose sum is σ = 2078169600. Its totient is φ = 1943993520.

The previous prime is 2011009999. The next prime is 2011010033. The reversal of 2011010021 is 1200101102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011010021 is a prime.

It is a super-2 number, since 2×2011010021² = 8088322609124840882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011009990 and 2011010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011010821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6806 + ... + 63783.

It is an arithmetic number, because the mean of its divisors is an integer number (259771200).

Almost surely, 2^2011010021 is an apocalyptic number.

It is an amenable number.

2011010021 is a deficient number, since it is larger than the sum of its proper divisors (67159579).

2011010021 is an equidigital number, since it uses as much as digits as its factorization.

2011010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71539.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2011010021 is about 44844.2863807643. The cubic root of 2011010021 is about 1262.2287799047.

Adding to 2011010021 its reverse (1200101102), we get a palindrome (3211111123).

The spelling of 2011010021 in words is "two billion, eleven million, ten thousand, twenty-one".