212001102021161 has 2 divisors, whose sum is σ = 212001102021162. Its totient is φ = 212001102021160.

The previous prime is 212001102021131. The next prime is 212001102021223. The reversal of 212001102021161 is 161120201100212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187281113534761 + 24719988486400 = 13685069^2 + 4971920^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001102021161 - 2³⁴ = 211983922151977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212001102021131) 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, 106000551010580 + 106000551010581.

It is an arithmetic number, because the mean of its divisors is an integer number (106000551010581).

Almost surely, 2^{212001102021161} is an apocalyptic number.

It is an amenable number.

212001102021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001102021161 is an equidigital number, since it uses as much as digits as its factorization.

212001102021161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 212001102021161 its reverse (161120201100212), we get a palindrome (373121303121373).

The spelling of 212001102021161 in words is "two hundred twelve trillion, one billion, one hundred two million, twenty-one thousand, one hundred sixty-one".