4012322021 has 2 divisors, whose sum is σ = 4012322022. Its totient is φ = 4012322020.

The previous prime is 4012322011. The next prime is 4012322023. The reversal of 4012322021 is 1202232104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3476399521 + 535922500 = 58961^2 + 23150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4012322021 is a prime.

Together with 4012322023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4012322023) 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, 2006161010 + 2006161011.

It is an arithmetic number, because the mean of its divisors is an integer number (2006161011).

Almost surely, 2^4012322021 is an apocalyptic number.

It is an amenable number.

4012322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012322021 is an equidigital number, since it uses as much as digits as its factorization.

4012322021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4012322021 is about 63342.8924268540. The cubic root of 4012322021 is about 1589.0293801780.

Adding to 4012322021 its reverse (1202232104), we get a palindrome (5214554125).

The spelling of 4012322021 in words is "four billion, twelve million, three hundred twenty-two thousand, twenty-one".