212201022021101 has 2 divisors, whose sum is σ = 212201022021102. Its totient is φ = 212201022021100.

The previous prime is 212201022021049. The next prime is 212201022021113. The reversal of 212201022021101 is 101120220102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185102854773001 + 27098167248100 = 13605251^2 + 5205590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201022021101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212201022021101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212201022021181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100511010550 + 106100511010551.

It is an arithmetic number, because the mean of its divisors is an integer number (106100511010551).

Almost surely, 2^{212201022021101} is an apocalyptic number.

It is an amenable number.

212201022021101 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201022021101 is an equidigital number, since it uses as much as digits as its factorization.

212201022021101 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 212201022021101 its reverse (101120220102212), we get a palindrome (313321242123313).

The spelling of 212201022021101 in words is "two hundred twelve trillion, two hundred one billion, twenty-two million, twenty-one thousand, one hundred one".