13220131421 has 8 divisors (see below), whose sum is σ = 15227688960. Its totient is φ = 11242315728.

The previous prime is 13220131403. The next prime is 13220131423. The reversal of 13220131421 is 12413102231.

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

It is not a de Polignac number, because 13220131421 - 2²⁶ = 13153022557 is a prime.

It is a super-2 number, since 2×13220131421² (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 = 13220131393 and 13220131402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220131423) 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, 7434506 + ... + 7436283.

It is an arithmetic number, because the mean of its divisors is an integer number (1903461120).

Almost surely, 2^13220131421 is an apocalyptic number.

It is an amenable number.

13220131421 is a deficient number, since it is larger than the sum of its proper divisors (2007557539).

13220131421 is a wasteful number, since it uses less digits than its factorization.

13220131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14870923.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13220131421 its reverse (12413102231), we get a palindrome (25633233652).

The spelling of 13220131421 in words is "thirteen billion, two hundred twenty million, one hundred thirty-one thousand, four hundred twenty-one".