211201220202101 has 2 divisors, whose sum is σ = 211201220202102. Its totient is φ = 211201220202100.

The previous prime is 211201220202029. The next prime is 211201220202109. The reversal of 211201220202101 is 101202022102112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110608845521476 + 100592374680625 = 10517074^2 + 10029575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211201220202101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211201220202101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211201220202109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600610101050 + 105600610101051.

It is an arithmetic number, because the mean of its divisors is an integer number (105600610101051).

Almost surely, 2^{211201220202101} is an apocalyptic number.

It is an amenable number.

211201220202101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211201220202101 is an equidigital number, since it uses as much as digits as its factorization.

211201220202101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211201220202101 its reverse (101202022102112), we get a palindrome (312403242304213).

The spelling of 211201220202101 in words is "two hundred eleven trillion, two hundred one billion, two hundred twenty million, two hundred two thousand, one hundred one".