21113013349 has 2 divisors, whose sum is σ = 21113013350. Its totient is φ = 21113013348.

The previous prime is 21113013301. The next prime is 21113013377. The reversal of 21113013349 is 94331031112.

It is an a-pointer prime, because the next prime (21113013377) can be obtained adding 21113013349 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18229860324 + 2883153025 = 135018^2 + 53695^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113013349 - 2³¹ = 18965529701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113053349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556506674 + 10556506675.

It is an arithmetic number, because the mean of its divisors is an integer number (10556506675).

Almost surely, 2^21113013349 is an apocalyptic number.

It is an amenable number.

21113013349 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113013349 is an equidigital number, since it uses as much as digits as its factorization.

21113013349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 21113013349 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, three hundred forty-nine".