212100566551 has 2 divisors, whose sum is σ = 212100566552. Its totient is φ = 212100566550.

The previous prime is 212100566519. The next prime is 212100566581. The reversal of 212100566551 is 155665001212.

212100566551 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 is a cyclic number.

It is not a de Polignac number, because 212100566551 - 2⁵ = 212100566519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212100566581) 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, 106050283275 + 106050283276.

It is an arithmetic number, because the mean of its divisors is an integer number (106050283276).

Almost surely, 2^212100566551 is an apocalyptic number.

212100566551 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100566551 is an equidigital number, since it uses as much as digits as its factorization.

212100566551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 212100566551 its reverse (155665001212), we get a palindrome (367765567763).

The spelling of 212100566551 in words is "two hundred twelve billion, one hundred million, five hundred sixty-six thousand, five hundred fifty-one".