21134311131 has 8 divisors (see below), whose sum is σ = 28180135744. Its totient is φ = 14089013640.

The previous prime is 21134311109. The next prime is 21134311147. The reversal of 21134311131 is 13111343112.

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

It is not a de Polignac number, because 21134311131 - 2¹⁴ = 21134294747 is a prime.

It is a super-2 number, since 2×21134311131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21134311098 and 21134311107.

It is not an unprimeable number, because it can be changed into a prime (21134311031) 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, 26125 + ... + 207246.

It is an arithmetic number, because the mean of its divisors is an integer number (3522516968).

Almost surely, 2^21134311131 is an apocalyptic number.

21134311131 is a deficient number, since it is larger than the sum of its proper divisors (7045824613).

21134311131 is a wasteful number, since it uses less digits than its factorization.

21134311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263561.

The product of its digits is 216, while the sum is 21.

Adding to 21134311131 its reverse (13111343112), we get a palindrome (34245654243).

The spelling of 21134311131 in words is "twenty-one billion, one hundred thirty-four million, three hundred eleven thousand, one hundred thirty-one".