13122310221 has 24 divisors (see below), whose sum is σ = 20313121920. Its totient is φ = 8141687136.

The previous prime is 13122310219. The next prime is 13122310231. The reversal of 13122310221 is 12201322131.

13122310221 is a `hidden beast` number, since 13 + 122 + 310 + 221 = 666.

It is not a de Polignac number, because 13122310221 - 2¹ = 13122310219 is a prime.

It is a super-2 number, since 2×13122310221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13122310194 and 13122310203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122310211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 849001 + ... + 864318.

It is an arithmetic number, because the mean of its divisors is an integer number (846380080).

Almost surely, 2^13122310221 is an apocalyptic number.

It is an amenable number.

13122310221 is a deficient number, since it is larger than the sum of its proper divisors (7190811699).

13122310221 is a wasteful number, since it uses less digits than its factorization.

13122310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713385 (or 1713382 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13122310221 its reverse (12201322131), we get a palindrome (25323632352).

The spelling of 13122310221 in words is "thirteen billion, one hundred twenty-two million, three hundred ten thousand, two hundred twenty-one".