13531102421 has 8 divisors (see below), whose sum is σ = 13769453760. Its totient is φ = 13293051552.

The previous prime is 13531102393. The next prime is 13531102457. The reversal of 13531102421 is 12420113531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531102421 is a prime.

It is a super-2 number, since 2×13531102421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531105421) 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, 16721 + ... + 165353.

It is an arithmetic number, because the mean of its divisors is an integer number (1721181720).

Almost surely, 2^13531102421 is an apocalyptic number.

It is an amenable number.

13531102421 is a deficient number, since it is larger than the sum of its proper divisors (238351339).

13531102421 is a wasteful number, since it uses less digits than its factorization.

13531102421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150235.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 13531102421 its reverse (12420113531), we get a palindrome (25951215952).

It can be divided in two parts, 1353110 and 2421, that added together give a palindrome (1355531).

The spelling of 13531102421 in words is "thirteen billion, five hundred thirty-one million, one hundred two thousand, four hundred twenty-one".