13193310221 has 24 divisors (see below), whose sum is σ = 16754351544. Its totient is φ = 10295631360.

The previous prime is 13193310203. The next prime is 13193310227. The reversal of 13193310221 is 12201339131.

It can be written as a sum of positive squares in 4 ways, for example, as 1688388100 + 11504922121 = 41090^2 + 107261^2 .

It is not a de Polignac number, because 13193310221 - 2⁶ = 13193310157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13193310227) 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, 95360 + ... + 188361.

It is an arithmetic number, because the mean of its divisors is an integer number (698097981).

Almost surely, 2^13193310221 is an apocalyptic number.

It is an amenable number.

13193310221 is a deficient number, since it is larger than the sum of its proper divisors (3561041323).

13193310221 is a wasteful number, since it uses less digits than its factorization.

13193310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283821 (or 283814 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 13193310221 its reverse (12201339131), we get a palindrome (25394649352).

The spelling of 13193310221 in words is "thirteen billion, one hundred ninety-three million, three hundred ten thousand, two hundred twenty-one".