21143110 has 16 divisors (see below), whose sum is σ = 38110032. Its totient is φ = 8445600.

The previous prime is 21143081. The next prime is 21143113. The reversal of 21143110 is 1134112.

It is a super-2 number, since 2×21143110² = 894062200944200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13045 + ... + 14575.

It is an arithmetic number, because the mean of its divisors is an integer number (2381877).

Almost surely, 2^21143110 is an apocalyptic number.

21143110 is a deficient number, since it is larger than the sum of its proper divisors (16966922).

21143110 is a wasteful number, since it uses less digits than its factorization.

21143110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21143110 is about 4598.1637639388. The cubic root of 21143110 is about 276.5177130812.

Adding to 21143110 its reverse (1134112), we get a palindrome (22277222).

The spelling of 21143110 in words is "twenty-one million, one hundred forty-three thousand, one hundred ten".