212342023021 has 2 divisors, whose sum is σ = 212342023022. Its totient is φ = 212342023020.

The previous prime is 212342023009. The next prime is 212342023027. The reversal of 212342023021 is 120320243212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203333355625 + 9008667396 = 450925^2 + 94914^2 .

It is a cyclic number.

It is not a de Polignac number, because 212342023021 - 2⁵ = 212342022989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212342022983 and 212342023001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212342023027) 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 as a sum of consecutive naturals, namely, 106171011510 + 106171011511.

It is an arithmetic number, because the mean of its divisors is an integer number (106171011511).

Almost surely, 2^212342023021 is an apocalyptic number.

It is an amenable number.

212342023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212342023021 is an equidigital number, since it uses as much as digits as its factorization.

212342023021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 212342023021 its reverse (120320243212), we get a palindrome (332662266233).

The spelling of 212342023021 in words is "two hundred twelve billion, three hundred forty-two million, twenty-three thousand, twenty-one".