21130341231 has 16 divisors (see below), whose sum is σ = 28248477824. Its totient is φ = 14049599904.

The previous prime is 21130341229. The next prime is 21130341283. The reversal of 21130341231 is 13214303112.

It is not a de Polignac number, because 21130341231 - 2¹ = 21130341229 is a prime.

It is a super-2 number, since 2×21130341231² (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 = 21130341198 and 21130341207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130341031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1917720 + ... + 1928706.

It is an arithmetic number, because the mean of its divisors is an integer number (1765529864).

Almost surely, 2^21130341231 is an apocalyptic number.

21130341231 is a deficient number, since it is larger than the sum of its proper divisors (7118136593).

21130341231 is a wasteful number, since it uses less digits than its factorization.

21130341231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12630.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21130341231 its reverse (13214303112), we get a palindrome (34344644343).

The spelling of 21130341231 in words is "twenty-one billion, one hundred thirty million, three hundred forty-one thousand, two hundred thirty-one".