212021031241 has 2 divisors, whose sum is σ = 212021031242. Its totient is φ = 212021031240.

The previous prime is 212021031223. The next prime is 212021031359. The reversal of 212021031241 is 142130120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161439222025 + 50581809216 = 401795^2 + 224904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021031241 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021031841) 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, 106010515620 + 106010515621.

It is an arithmetic number, because the mean of its divisors is an integer number (106010515621).

Almost surely, 2^212021031241 is an apocalyptic number.

It is an amenable number.

212021031241 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021031241 is an equidigital number, since it uses as much as digits as its factorization.

212021031241 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 19.

Adding to 212021031241 its reverse (142130120212), we get a palindrome (354151151453).

The spelling of 212021031241 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, two hundred forty-one".