212021073457 has 2 divisors, whose sum is σ = 212021073458. Its totient is φ = 212021073456.

The previous prime is 212021073403. The next prime is 212021073493. The reversal of 212021073457 is 754370120212.

212021073457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194502168576 + 17518904881 = 441024^2 + 132359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021073457 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021073497) 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, 106010536728 + 106010536729.

It is an arithmetic number, because the mean of its divisors is an integer number (106010536729).

Almost surely, 2^212021073457 is an apocalyptic number.

It is an amenable number.

212021073457 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021073457 is an equidigital number, since it uses as much as digits as its factorization.

212021073457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

Adding to 212021073457 its reverse (754370120212), we get a palindrome (966391193669).

The spelling of 212021073457 in words is "two hundred twelve billion, twenty-one million, seventy-three thousand, four hundred fifty-seven".