212947169641 has 2 divisors, whose sum is σ = 212947169642. Its totient is φ = 212947169640.

The previous prime is 212947169597. The next prime is 212947169653. The reversal of 212947169641 is 146961749212.

It is a happy number.

212947169641 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., 159058190041 + 53888979600 = 398821^2 + 232140^2 .

It is a cyclic number.

It is not a de Polignac number, because 212947169641 - 2⁹ = 212947169129 is a prime.

It is a super-2 number, since 2×212947169641² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212947164641) 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, 106473584820 + 106473584821.

It is an arithmetic number, because the mean of its divisors is an integer number (106473584821).

Almost surely, 2^212947169641 is an apocalyptic number.

It is an amenable number.

212947169641 is a deficient number, since it is larger than the sum of its proper divisors (1).

212947169641 is an equidigital number, since it uses as much as digits as its factorization.

212947169641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The spelling of 212947169641 in words is "two hundred twelve billion, nine hundred forty-seven million, one hundred sixty-nine thousand, six hundred forty-one".