2012240021 has 8 divisors (see below), whose sum is σ = 2195495904. Its totient is φ = 1829038320.

The previous prime is 2012239979. The next prime is 2012240057. The reversal of 2012240021 is 1200422102.

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 2012240021 - 2¹⁰ = 2012238997 is a prime.

It is a super-2 number, since 2×2012240021² = 8098219804228160882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012239978 and 2012240005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012240221) 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, 134891 + ... + 149063.

It is an arithmetic number, because the mean of its divisors is an integer number (274436988).

Almost surely, 2^2012240021 is an apocalyptic number.

It is an amenable number.

2012240021 is a deficient number, since it is larger than the sum of its proper divisors (183255883).

2012240021 is a wasteful number, since it uses less digits than its factorization.

2012240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27091.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2012240021 is about 44857.9984060814. The cubic root of 2012240021 is about 1262.4860676958.

Adding to 2012240021 its reverse (1200422102), we get a palindrome (3212662123).

The spelling of 2012240021 in words is "two billion, twelve million, two hundred forty thousand, twenty-one".