21004030141 has 4 divisors (see below), whose sum is σ = 21004880992. Its totient is φ = 21003179292.

The previous prime is 21004030051. The next prime is 21004030183. The reversal of 21004030141 is 14103040012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21004030141 - 2¹⁵ = 21003997373 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 (21004030441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387255 + ... + 438148.

It is an arithmetic number, because the mean of its divisors is an integer number (5251220248).

Almost surely, 2^21004030141 is an apocalyptic number.

It is an amenable number.

21004030141 is a deficient number, since it is larger than the sum of its proper divisors (850851).

21004030141 is an equidigital number, since it uses as much as digits as its factorization.

21004030141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850850.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21004030141 its reverse (14103040012), we get a palindrome (35107070153).

The spelling of 21004030141 in words is "twenty-one billion, four million, thirty thousand, one hundred forty-one".