212130121001 has 2 divisors, whose sum is σ = 212130121002. Its totient is φ = 212130121000.

The previous prime is 212130120977. The next prime is 212130121013. The reversal of 212130121001 is 100121031212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210037973401 + 2092147600 = 458299^2 + 45740^2 .

It is a cyclic number.

It is not a de Polignac number, because 212130121001 - 2¹⁴ = 212130104617 is a prime.

It is not a weakly prime, because it can be changed into another prime (212130141001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106065060500 + 106065060501.

It is an arithmetic number, because the mean of its divisors is an integer number (106065060501).

Almost surely, 2^212130121001 is an apocalyptic number.

It is an amenable number.

212130121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

212130121001 is an equidigital number, since it uses as much as digits as its factorization.

212130121001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212130121001 its reverse (100121031212), we get a palindrome (312251152213).

The spelling of 212130121001 in words is "two hundred twelve billion, one hundred thirty million, one hundred twenty-one thousand, one".