13531130421 has 16 divisors (see below), whose sum is σ = 19159131840. Its totient is φ = 8470344960.

The previous prime is 13531130419. The next prime is 13531130447. The reversal of 13531130421 is 12403113531.

It is not a de Polignac number, because 13531130421 - 2¹ = 13531130419 is a prime.

It is a super-2 number, since 2×13531130421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13531130391 and 13531130400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531130401) 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, 1043950 + ... + 1056831.

It is an arithmetic number, because the mean of its divisors is an integer number (1197445740).

Almost surely, 2^13531130421 is an apocalyptic number.

It is an amenable number.

13531130421 is a deficient number, since it is larger than the sum of its proper divisors (5628001419).

13531130421 is a wasteful number, since it uses less digits than its factorization.

13531130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100916.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 13531130421 its reverse (12403113531), we get a palindrome (25934243952).

The spelling of 13531130421 in words is "thirteen billion, five hundred thirty-one million, one hundred thirty thousand, four hundred twenty-one".