13031212110221 has 4 divisors (see below), whose sum is σ = 13717065379200. Its totient is φ = 12345358841244.

The previous prime is 13031212110197. The next prime is 13031212110239. The reversal of 13031212110221 is 12201121213031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13031212110221 - 2³⁰ = 13030138368397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13031212110193 and 13031212110202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031212110821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342926634461 + ... + 342926634498.

It is an arithmetic number, because the mean of its divisors is an integer number (3429266344800).

Almost surely, 2^{13031212110221} is an apocalyptic number.

It is an amenable number.

13031212110221 is a deficient number, since it is larger than the sum of its proper divisors (685853268979).

13031212110221 is an equidigital number, since it uses as much as digits as its factorization.

13031212110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685853268978.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 13031212110221 its reverse (12201121213031), we get a palindrome (25232333323252).

The spelling of 13031212110221 in words is "thirteen trillion, thirty-one billion, two hundred twelve million, one hundred ten thousand, two hundred twenty-one".