201212012101 has 2 divisors, whose sum is σ = 201212012102. Its totient is φ = 201212012100.

The previous prime is 201212012059. The next prime is 201212012137. The reversal of 201212012101 is 101210212102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107091908001 + 94120104100 = 327249^2 + 306790^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212012101 - 2¹⁵ = 201211979333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212010101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606006050 + 100606006051.

It is an arithmetic number, because the mean of its divisors is an integer number (100606006051).

Almost surely, 2^201212012101 is an apocalyptic number.

It is an amenable number.

201212012101 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212012101 is an equidigital number, since it uses as much as digits as its factorization.

201212012101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201212012101 its reverse (101210212102), we get a palindrome (302422224203).

The spelling of 201212012101 in words is "two hundred one billion, two hundred twelve million, twelve thousand, one hundred one".