2011240021 has 8 divisors (see below), whose sum is σ = 2299644864. Its totient is φ = 1723106400.

The previous prime is 2011239983. The next prime is 2011240057. The reversal of 2011240021 is 1200421102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2011240021 - 2²⁹ = 1474369109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011239983 and 2011240010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011240061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51655 + ... + 81796.

It is an arithmetic number, because the mean of its divisors is an integer number (287455608).

Almost surely, 2^2011240021 is an apocalyptic number.

It is an amenable number.

2011240021 is a deficient number, since it is larger than the sum of its proper divisors (288404843).

2011240021 is a wasteful number, since it uses less digits than its factorization.

2011240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135611.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2011240021 is about 44846.8507367017. The cubic root of 2011240021 is about 1262.2768986029.

Adding to 2011240021 its reverse (1200421102), we get a palindrome (3211661123).

The spelling of 2011240021 in words is "two billion, eleven million, two hundred forty thousand, twenty-one".