21141171 has 12 divisors (see below), whose sum is σ = 31363072. Its totient is φ = 13712976.

The previous prime is 21141161. The next prime is 21141227. The reversal of 21141171 is 17114112.

It is not a de Polignac number, because 21141171 - 2⁵ = 21141139 is a prime.

It is a super-2 number, since 2×21141171² = 893898222502482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21141161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31411 + ... + 32076.

Almost surely, 2^21141171 is an apocalyptic number.

21141171 is a deficient number, since it is larger than the sum of its proper divisors (10221901).

21141171 is a wasteful number, since it uses less digits than its factorization.

21141171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63530 (or 63527 counting only the distinct ones).

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

The square root of 21141171 is about 4597.9529140695. The cubic root of 21141171 is about 276.5092598272.

Adding to 21141171 its reverse (17114112), we get a palindrome (38255283).

It can be divided in two parts, 21141 and 171, that added together give a palindrome (21312).

The spelling of 21141171 in words is "twenty-one million, one hundred forty-one thousand, one hundred seventy-one".