13022021312221 has 4 divisors (see below), whose sum is σ = 13022078280832. Its totient is φ = 13021964343612.

The previous prime is 13022021312057. The next prime is 13022021312299. The reversal of 13022021312221 is 12221312022031.

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 13022021312221 - 2¹³ = 13022021304029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13022021312192 and 13022021312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022021312021) 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, 28140045 + ... + 28599058.

It is an arithmetic number, because the mean of its divisors is an integer number (3255519570208).

Almost surely, 2^{13022021312221} is an apocalyptic number.

It is an amenable number.

13022021312221 is a deficient number, since it is larger than the sum of its proper divisors (56968611).

13022021312221 is an equidigital number, since it uses as much as digits as its factorization.

13022021312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56968610.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 13022021312221 its reverse (12221312022031), we get a palindrome (25243333334252).

The spelling of 13022021312221 in words is "thirteen trillion, twenty-two billion, twenty-one million, three hundred twelve thousand, two hundred twenty-one".