12116621 has 4 divisors (see below), whose sum is σ = 13218144. Its totient is φ = 11015100.

The previous prime is 12116617. The next prime is 12116633. The reversal of 12116621 is 12661121.

12116621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12116621 - 2² = 12116617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12116593 and 12116602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12116641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550745 + ... + 550766.

It is an arithmetic number, because the mean of its divisors is an integer number (3304536).

Almost surely, 2^12116621 is an apocalyptic number.

12116621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12116621 is a deficient number, since it is larger than the sum of its proper divisors (1101523).

12116621 is a wasteful number, since it uses less digits than its factorization.

12116621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101522.

The product of its digits is 144, while the sum is 20.

The square root of 12116621 is about 3480.8937070816. The cubic root of 12116621 is about 229.6821128297.

Adding to 12116621 its reverse (12661121), we get a palindrome (24777742).

The spelling of 12116621 in words is "twelve million, one hundred sixteen thousand, six hundred twenty-one".