21141711 has 6 divisors (see below), whose sum is σ = 30538040. Its totient is φ = 14094468.

The previous prime is 21141707. The next prime is 21141713. The reversal of 21141711 is 11714112.

It is not a de Polignac number, because 21141711 - 2² = 21141707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174531 + ... + 1174548.

Almost surely, 2^21141711 is an apocalyptic number.

21141711 is a deficient number, since it is larger than the sum of its proper divisors (9396329).

21141711 is a wasteful number, since it uses less digits than its factorization.

21141711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349085 (or 2349082 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 21141711 is about 4598.0116354790. The cubic root of 21141711 is about 276.5116140602.

Adding to 21141711 its reverse (11714112), we get a palindrome (32855823).

The spelling of 21141711 in words is "twenty-one million, one hundred forty-one thousand, seven hundred eleven".