13131221335 has 16 divisors (see below), whose sum is σ = 16294367232. Its totient is φ = 10148234400.

The previous prime is 13131221333. The next prime is 13131221339. The reversal of 13131221335 is 53312213131.

It is not a de Polignac number, because 13131221335 - 2¹ = 13131221333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131221333) 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, 14322 + ... + 162688.

It is an arithmetic number, because the mean of its divisors is an integer number (1018397952).

Almost surely, 2^13131221335 is an apocalyptic number.

13131221335 is a deficient number, since it is larger than the sum of its proper divisors (3163145897).

13131221335 is a wasteful number, since it uses less digits than its factorization.

13131221335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148974.

The product of its digits is 1620, while the sum is 25.

Adding to 13131221335 its reverse (53312213131), we get a palindrome (66443434466).

The spelling of 13131221335 in words is "thirteen billion, one hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-five".