21411701 has 2 divisors, whose sum is σ = 21411702. Its totient is φ = 21411700.

The previous prime is 21411679. The next prime is 21411707. The reversal of 21411701 is 10711412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 8844676 = 3545^2 + 2974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21411701 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 21411701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705850 + 10705851.

It is an arithmetic number, because the mean of its divisors is an integer number (10705851).

Almost surely, 2^21411701 is an apocalyptic number.

It is an amenable number.

21411701 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411701 is an equidigital number, since it uses as much as digits as its factorization.

21411701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 21411701 is about 4627.2779255195. The cubic root of 21411701 is about 277.6837016476.

The spelling of 21411701 in words is "twenty-one million, four hundred eleven thousand, seven hundred one".