13130331221 has 16 divisors (see below), whose sum is σ = 15382338048. Its totient is φ = 10972752000.

The previous prime is 13130331217. The next prime is 13130331271. The reversal of 13130331221 is 12213303131.

It is not a de Polignac number, because 13130331221 - 2² = 13130331217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13130331193 and 13130331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13130331271) 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, 439871 + ... + 468771.

It is an arithmetic number, because the mean of its divisors is an integer number (961396128).

Almost surely, 2^13130331221 is an apocalyptic number.

It is an amenable number.

13130331221 is a deficient number, since it is larger than the sum of its proper divisors (2252006827).

13130331221 is a wasteful number, since it uses less digits than its factorization.

13130331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30532.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13130331221 its reverse (12213303131), we get a palindrome (25343634352).

The spelling of 13130331221 in words is "thirteen billion, one hundred thirty million, three hundred thirty-one thousand, two hundred twenty-one".