212496121 has 2 divisors, whose sum is σ = 212496122. Its totient is φ = 212496120.

The previous prime is 212496101. The next prime is 212496127. The reversal of 212496121 is 121694212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179560000 + 32936121 = 13400^2 + 5739^2 .

It is a cyclic number.

It is not a de Polignac number, because 212496121 - 2²⁷ = 78278393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212496121.

It is not a weakly prime, because it can be changed into another prime (212496127) 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, 106248060 + 106248061.

It is an arithmetic number, because the mean of its divisors is an integer number (106248061).

Almost surely, 2^212496121 is an apocalyptic number.

It is an amenable number.

212496121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212496121 is an equidigital number, since it uses as much as digits as its factorization.

212496121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 212496121 is about 14577.2466879037. The cubic root of 212496121 is about 596.7379649445.

The spelling of 212496121 in words is "two hundred twelve million, four hundred ninety-six thousand, one hundred twenty-one".