21131341427 has 8 divisors (see below), whose sum is σ = 24152234496. Its totient is φ = 18110980872.

The previous prime is 21131341409. The next prime is 21131341447. The reversal of 21131341427 is 72414313112.

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 21131341427 - 2¹⁸ = 21131079283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21131341427.

It is not an unprimeable number, because it can be changed into a prime (21131341447) 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, 44123 + ... + 210260.

It is an arithmetic number, because the mean of its divisors is an integer number (3019029312).

Almost surely, 2^21131341427 is an apocalyptic number.

21131341427 is a deficient number, since it is larger than the sum of its proper divisors (3020893069).

21131341427 is a wasteful number, since it uses less digits than its factorization.

21131341427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266257.

The product of its digits is 4032, while the sum is 29.

Adding to 21131341427 its reverse (72414313112), we get a palindrome (93545654539).

The spelling of 21131341427 in words is "twenty-one billion, one hundred thirty-one million, three hundred forty-one thousand, four hundred twenty-seven".