21246101 has 2 divisors, whose sum is σ = 21246102. Its totient is φ = 21246100.

The previous prime is 21246079. The next prime is 21246131. The reversal of 21246101 is 10164212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 361201 = 4570^2 + 601^2 .

It is a cyclic number.

It is not a de Polignac number, because 21246101 - 2¹⁴ = 21229717 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21246101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21246131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623050 + 10623051.

It is an arithmetic number, because the mean of its divisors is an integer number (10623051).

Almost surely, 2^21246101 is an apocalyptic number.

It is an amenable number.

21246101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246101 is an equidigital number, since it uses as much as digits as its factorization.

21246101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21246101 is about 4609.3493033182. The cubic root of 21246101 is about 276.9659713093.

The spelling of 21246101 in words is "twenty-one million, two hundred forty-six thousand, one hundred one".