21103201311349 has 2 divisors, whose sum is σ = 21103201311350. Its totient is φ = 21103201311348.

The previous prime is 21103201311301. The next prime is 21103201311419. The reversal of 21103201311349 is 94311310230112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21064152784900 + 39048526449 = 4589570^2 + 197607^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103201311349 - 2²¹ = 21103199214197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21103201311349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103201311749) 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, 10551600655674 + 10551600655675.

It is an arithmetic number, because the mean of its divisors is an integer number (10551600655675).

Almost surely, 2^{21103201311349} is an apocalyptic number.

It is an amenable number.

21103201311349 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103201311349 is an equidigital number, since it uses as much as digits as its factorization.

21103201311349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21103201311349 in words is "twenty-one trillion, one hundred three billion, two hundred one million, three hundred eleven thousand, three hundred forty-nine".