211430404421101 has 2 divisors, whose sum is σ = 211430404421102. Its totient is φ = 211430404421100.

The previous prime is 211430404421087. The next prime is 211430404421129. The reversal of 211430404421101 is 101124404034112.

It is a happy number.

It is an a-pointer prime, because the next prime (211430404421129) can be obtained adding 211430404421101 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124641616818601 + 86788787602500 = 11164301^2 + 9316050^2 .

It is a cyclic number.

It is not a de Polignac number, because 211430404421101 - 2⁹ = 211430404420589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211430404421101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211430404421191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105715202210550 + 105715202210551.

It is an arithmetic number, because the mean of its divisors is an integer number (105715202210551).

Almost surely, 2^{211430404421101} is an apocalyptic number.

It is an amenable number.

211430404421101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211430404421101 is an equidigital number, since it uses as much as digits as its factorization.

211430404421101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 211430404421101 its reverse (101124404034112), we get a palindrome (312554808455213).

The spelling of 211430404421101 in words is "two hundred eleven trillion, four hundred thirty billion, four hundred four million, four hundred twenty-one thousand, one hundred one".