12209488621 has 16 divisors (see below), whose sum is σ = 14589253440. Its totient is φ = 10086388480.

The previous prime is 12209488619. The next prime is 12209488639. The reversal of 12209488621 is 12688490221.

It is a cyclic number.

It is not a de Polignac number, because 12209488621 - 2¹ = 12209488619 is a prime.

It is a super-2 number, since 2×12209488621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209488721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120291 + ... + 1131136.

It is an arithmetic number, because the mean of its divisors is an integer number (911828340).

Almost surely, 2^12209488621 is an apocalyptic number.

12209488621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12209488621 is a deficient number, since it is larger than the sum of its proper divisors (2379764819).

12209488621 is a wasteful number, since it uses less digits than its factorization.

12209488621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251484.

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 12209488621 in words is "twelve billion, two hundred nine million, four hundred eighty-eight thousand, six hundred twenty-one".