2012231021 has 2 divisors, whose sum is σ = 2012231022. Its totient is φ = 2012231020.

The previous prime is 2012231009. The next prime is 2012231047. The reversal of 2012231021 is 1201322102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1422421225 + 589809796 = 37715^2 + 24286^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012231021 - 2¹⁴ = 2012214637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012230987 and 2012231005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012233021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006115510 + 1006115511.

It is an arithmetic number, because the mean of its divisors is an integer number (1006115511).

Almost surely, 2^2012231021 is an apocalyptic number.

It is an amenable number.

2012231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012231021 is an equidigital number, since it uses as much as digits as its factorization.

2012231021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2012231021 is about 44857.8980894112. The cubic root of 2012231021 is about 1262.4841854830.

Adding to 2012231021 its reverse (1201322102), we get a palindrome (3213553123).

The spelling of 2012231021 in words is "two billion, twelve million, two hundred thirty-one thousand, twenty-one".