13132021221 has 36 divisors (see below), whose sum is σ = 20861699040. Its totient is φ = 7954201200.

The previous prime is 13132021207. The next prime is 13132021223. The reversal of 13132021221 is 12212023131.

13132021221 is a `hidden beast` number, since 131 + 320 + 212 + 2 + 1 = 666.

It is not a de Polignac number, because 13132021221 - 2¹⁸ = 13131759077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13132021194 and 13132021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13132021223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3473110 + ... + 3476888.

It is an arithmetic number, because the mean of its divisors is an integer number (579491640).

Almost surely, 2^13132021221 is an apocalyptic number.

13132021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13132021221 is a deficient number, since it is larger than the sum of its proper divisors (7729677819).

13132021221 is a wasteful number, since it uses less digits than its factorization.

13132021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6998 (or 6984 counting only the distinct ones).

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

Adding to 13132021221 its reverse (12212023131), we get a palindrome (25344044352).

The spelling of 13132021221 in words is "thirteen billion, one hundred thirty-two million, twenty-one thousand, two hundred twenty-one".