2012211021 has 4 divisors (see below), whose sum is σ = 2682948032. Its totient is φ = 1341474012.

The previous prime is 2012211007. The next prime is 2012211037. The reversal of 2012211021 is 1201122102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2012211021 - 2¹¹ = 2012208973 is a prime.

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 = 2012210988 and 2012211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012211521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335368501 + ... + 335368506.

It is an arithmetic number, because the mean of its divisors is an integer number (670737008).

Almost surely, 2^2012211021 is an apocalyptic number.

It is an amenable number.

2012211021 is a deficient number, since it is larger than the sum of its proper divisors (670737011).

2012211021 is an equidigital number, since it uses as much as digits as its factorization.

2012211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670737010.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2012211021 is about 44857.6751626742. The cubic root of 2012211021 is about 1262.4800027679.

Adding to 2012211021 its reverse (1201122102), we get a palindrome (3213333123).

The spelling of 2012211021 in words is "two billion, twelve million, two hundred eleven thousand, twenty-one".