201212112120101 has 2 divisors, whose sum is σ = 201212112120102. Its totient is φ = 201212112120100.

The previous prime is 201212112120073. The next prime is 201212112120133. The reversal of 201212112120101 is 101021211212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196753194211876 + 4458917908225 = 14026874^2 + 2111615^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212112120101 - 2³⁰ = 201211038378277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201212112120101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212112120601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606056060050 + 100606056060051.

It is an arithmetic number, because the mean of its divisors is an integer number (100606056060051).

Almost surely, 2^{201212112120101} is an apocalyptic number.

It is an amenable number.

201212112120101 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212112120101 is an equidigital number, since it uses as much as digits as its factorization.

201212112120101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201212112120101 its reverse (101021211212102), we get a palindrome (302233323332203).

The spelling of 201212112120101 in words is "two hundred one trillion, two hundred twelve billion, one hundred twelve million, one hundred twenty thousand, one hundred one".