21030141 has 8 divisors (see below), whose sum is σ = 30589344. Its totient is φ = 12745520.

The previous prime is 21030127. The next prime is 21030181. The reversal of 21030141 is 14103012.

Added to its reverse (14103012) it gives a triangular number (35133153 = T₈₃₈₂).

It is a happy number.

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 21030141 - 2⁵ = 21030109 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030181) 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 7 ways as a sum of consecutive naturals, for example, 318606 + ... + 318671.

It is an arithmetic number, because the mean of its divisors is an integer number (3823668).

Almost surely, 2^21030141 is an apocalyptic number.

It is an amenable number.

21030141 is a deficient number, since it is larger than the sum of its proper divisors (9559203).

21030141 is a wasteful number, since it uses less digits than its factorization.

21030141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637291.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21030141 is about 4585.8631684777. The cubic root of 21030141 is about 276.0243493536.

Adding to 21030141 its reverse (14103012), we get a palindrome (35133153).

The spelling of 21030141 in words is "twenty-one million, thirty thousand, one hundred forty-one".