13321220311231 has 8 divisors (see below), whose sum is σ = 15234920507520. Its totient is φ = 11410187295768.

The previous prime is 13321220311181. The next prime is 13321220311303. The reversal of 13321220311231 is 13211302212331.

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

It is a cyclic number.

It is not a de Polignac number, because 13321220311231 - 2¹⁷ = 13321220180159 is a prime.

It is a super-2 number, since 2×13321220311231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13321220311196 and 13321220311205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321220311031) 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, 666784501 + ... + 666804478.

It is an arithmetic number, because the mean of its divisors is an integer number (1904365063440).

Almost surely, 2^{13321220311231} is an apocalyptic number.

13321220311231 is a deficient number, since it is larger than the sum of its proper divisors (1913700196289).

13321220311231 is a wasteful number, since it uses less digits than its factorization.

13321220311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333590413.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13321220311231 its reverse (13211302212331), we get a palindrome (26532522523562).

The spelling of 13321220311231 in words is "thirteen trillion, three hundred twenty-one billion, two hundred twenty million, three hundred eleven thousand, two hundred thirty-one".