21113149 has 8 divisors (see below), whose sum is σ = 22101120. Its totient is φ = 20131056.

The previous prime is 21113119. The next prime is 21113153. The reversal of 21113149 is 94131112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21113149 - 2¹⁷ = 20982077 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 (21113119) 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, 6979 + ... + 9535.

It is an arithmetic number, because the mean of its divisors is an integer number (2762640).

Almost surely, 2^21113149 is an apocalyptic number.

It is an amenable number.

21113149 is a deficient number, since it is larger than the sum of its proper divisors (987971).

21113149 is a wasteful number, since it uses less digits than its factorization.

21113149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939.

The product of its digits is 216, while the sum is 22.

The square root of 21113149 is about 4594.9046780102. The cubic root of 21113149 is about 276.3870375151.

The spelling of 21113149 in words is "twenty-one million, one hundred thirteen thousand, one hundred forty-nine".