21141211 has 16 divisors (see below), whose sum is σ = 26578944. Its totient is φ = 16367904.

The previous prime is 21141161. The next prime is 21141227. The reversal of 21141211 is 11214112.

It is not a de Polignac number, because 21141211 - 2⁷ = 21141083 is a prime.

It is a super-3 number, since 3×21141211³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 21141191 and 21141200.

It is not an unprimeable number, because it can be changed into a prime (21141271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1806 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (1661184).

Almost surely, 2^21141211 is an apocalyptic number.

21141211 is a deficient number, since it is larger than the sum of its proper divisors (5437733).

21141211 is a wasteful number, since it uses less digits than its factorization.

21141211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010.

The product of its digits is 16, while the sum is 13.

The square root of 21141211 is about 4597.9572638292. The cubic root of 21141211 is about 276.5094342162.

Adding to 21141211 its reverse (11214112), we get a palindrome (32355323).

The spelling of 21141211 in words is "twenty-one million, one hundred forty-one thousand, two hundred eleven".