21043000131 has 8 divisors (see below), whose sum is σ = 28081095504. Its totient is φ = 14016785760.

The previous prime is 21043000103. The next prime is 21043000141. The reversal of 21043000131 is 13100034012.

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

It is not a de Polignac number, because 21043000131 - 2¹¹ = 21042998083 is a prime.

It is a super-2 number, since 2×21043000131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21043000131.

It is not an unprimeable number, because it can be changed into a prime (21043000141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2966116 + ... + 2973201.

It is an arithmetic number, because the mean of its divisors is an integer number (3510136938).

Almost surely, 2^21043000131 is an apocalyptic number.

21043000131 is a deficient number, since it is larger than the sum of its proper divisors (7038095373).

21043000131 is a wasteful number, since it uses less digits than its factorization.

21043000131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5940501.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21043000131 its reverse (13100034012), we get a palindrome (34143034143).

The spelling of 21043000131 in words is "twenty-one billion, forty-three million, one hundred thirty-one", and thus it is an aban number.