21100113241 has 2 divisors, whose sum is σ = 21100113242. Its totient is φ = 21100113240.

The previous prime is 21100113233. The next prime is 21100113283. The reversal of 21100113241 is 14231100112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15874992016 + 5225121225 = 125996^2 + 72285^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100113241 - 2³ = 21100113233 is a prime.

It is not a weakly prime, because it can be changed into another prime (21100113211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550056620 + 10550056621.

It is an arithmetic number, because the mean of its divisors is an integer number (10550056621).

Almost surely, 2^21100113241 is an apocalyptic number.

It is an amenable number.

21100113241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100113241 is an equidigital number, since it uses as much as digits as its factorization.

21100113241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21100113241 its reverse (14231100112), we get a palindrome (35331213353).

The spelling of 21100113241 in words is "twenty-one billion, one hundred million, one hundred thirteen thousand, two hundred forty-one".