212001122110061 has 2 divisors, whose sum is σ = 212001122110062. Its totient is φ = 212001122110060.

The previous prime is 212001122110033. The next prime is 212001122110097. The reversal of 212001122110061 is 160011221100212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209945784124036 + 2055337986025 = 14489506^2 + 1433645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212001122110061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001122110021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000561055030 + 106000561055031.

It is an arithmetic number, because the mean of its divisors is an integer number (106000561055031).

Almost surely, 2^{212001122110061} is an apocalyptic number.

It is an amenable number.

212001122110061 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001122110061 is an equidigital number, since it uses as much as digits as its factorization.

212001122110061 is an evil number, because the sum of its binary digits is even.

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

Adding to 212001122110061 its reverse (160011221100212), we get a palindrome (372012343210273).

The spelling of 212001122110061 in words is "two hundred twelve trillion, one billion, one hundred twenty-two million, one hundred ten thousand, sixty-one".