13021331331 has 8 divisors (see below), whose sum is σ = 17371686160. Its totient is φ = 8675932032.

The previous prime is 13021331291. The next prime is 13021331353. The reversal of 13021331331 is 13313312031.

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

It is not a de Polignac number, because 13021331331 - 2²⁵ = 12987776899 is a prime.

It is a super-2 number, since 2×13021331331² (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 = 13021331298 and 13021331307.

It is not an unprimeable number, because it can be changed into a prime (13021331831) 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, 1232746 + ... + 1243263.

It is an arithmetic number, because the mean of its divisors is an integer number (2171460770).

Almost surely, 2^13021331331 is an apocalyptic number.

13021331331 is a deficient number, since it is larger than the sum of its proper divisors (4350354829).

13021331331 is a wasteful number, since it uses less digits than its factorization.

13021331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477765.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 13021331331 its reverse (13313312031), we get a palindrome (26334643362).

The spelling of 13021331331 in words is "thirteen billion, twenty-one million, three hundred thirty-one thousand, three hundred thirty-one".