21115525353341 has 2 divisors, whose sum is σ = 21115525353342. Its totient is φ = 21115525353340.

The previous prime is 21115525353337. The next prime is 21115525353367. The reversal of 21115525353341 is 14335352551112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14945994660025 + 6169530693316 = 3866005^2 + 2483854^2 .

It is a cyclic number.

It is not a de Polignac number, because 21115525353341 - 2² = 21115525353337 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21115525353311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557762676670 + 10557762676671.

It is an arithmetic number, because the mean of its divisors is an integer number (10557762676671).

Almost surely, 2^{21115525353341} is an apocalyptic number.

It is an amenable number.

21115525353341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21115525353341 is an equidigital number, since it uses as much as digits as its factorization.

21115525353341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 41.

The spelling of 21115525353341 in words is "twenty-one trillion, one hundred fifteen billion, five hundred twenty-five million, three hundred fifty-three thousand, three hundred forty-one".