13409188221 has 48 divisors (see below), whose sum is σ = 21261215232. Its totient is φ = 7451496000.

The previous prime is 13409188217. The next prime is 13409188223. The reversal of 13409188221 is 12288190431.

It is not a de Polignac number, because 13409188221 - 2² = 13409188217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 13409188221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13409188223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 834166 + ... + 850088.

It is an arithmetic number, because the mean of its divisors is an integer number (442941984).

Almost surely, 2^13409188221 is an apocalyptic number.

13409188221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13409188221 is a deficient number, since it is larger than the sum of its proper divisors (7852027011).

13409188221 is a wasteful number, since it uses less digits than its factorization.

13409188221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16114 (or 16101 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 13409188221 in words is "thirteen billion, four hundred nine million, one hundred eighty-eight thousand, two hundred twenty-one".