13031230312221 has 32 divisors (see below), whose sum is σ = 20225439790080. Its totient is φ = 7379552304000.

The previous prime is 13031230312193. The next prime is 13031230312229. The reversal of 13031230312221 is 12221303213031.

It is not a de Polignac number, because 13031230312221 - 2⁵ = 13031230312189 is a prime.

It is a super-2 number, since 2×13031230312221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13031230312191 and 13031230312200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031230312229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142306705 + ... + 142398246.

It is an arithmetic number, because the mean of its divisors is an integer number (632044993440).

Almost surely, 2^{13031230312221} is an apocalyptic number.

13031230312221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13031230312221 is a deficient number, since it is larger than the sum of its proper divisors (7194209477859).

13031230312221 is a wasteful number, since it uses less digits than its factorization.

13031230312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284705057.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 13031230312221 its reverse (12221303213031), we get a palindrome (25252533525252).

The spelling of 13031230312221 in words is "thirteen trillion, thirty-one billion, two hundred thirty million, three hundred twelve thousand, two hundred twenty-one".