21131124141 has 8 divisors (see below), whose sum is σ = 28194309184. Its totient is φ = 14077677600.

The previous prime is 21131124139. The next prime is 21131124149. The reversal of 21131124141 is 14142113112.

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

It is not a de Polignac number, because 21131124141 - 2¹ = 21131124139 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 (21131124149) 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, 2429560 + ... + 2438241.

It is an arithmetic number, because the mean of its divisors is an integer number (3524288648).

Almost surely, 2^21131124141 is an apocalyptic number.

It is an amenable number.

21131124141 is a deficient number, since it is larger than the sum of its proper divisors (7063185043).

21131124141 is a wasteful number, since it uses less digits than its factorization.

21131124141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869251.

The product of its digits is 192, while the sum is 21.

Adding to 21131124141 its reverse (14142113112), we get a palindrome (35273237253).

The spelling of 21131124141 in words is "twenty-one billion, one hundred thirty-one million, one hundred twenty-four thousand, one hundred forty-one".