212123014541 has 2 divisors, whose sum is σ = 212123014542. Its totient is φ = 212123014540.

The previous prime is 212123014531. The next prime is 212123014601. The reversal of 212123014541 is 145410321212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160918113316 + 51204901225 = 401146^2 + 226285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212123014541 is a prime.

It is a super-2 number, since 2×212123014541² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212123014541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212123014531) 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, 106061507270 + 106061507271.

It is an arithmetic number, because the mean of its divisors is an integer number (106061507271).

Almost surely, 2^212123014541 is an apocalyptic number.

It is an amenable number.

212123014541 is a deficient number, since it is larger than the sum of its proper divisors (1).

212123014541 is an equidigital number, since it uses as much as digits as its factorization.

212123014541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 212123014541 its reverse (145410321212), we get a palindrome (357533335753).

The spelling of 212123014541 in words is "two hundred twelve billion, one hundred twenty-three million, fourteen thousand, five hundred forty-one".