12196921 has 6 divisors (see below), whose sum is σ = 13406666. Its totient is φ = 11088000.

The previous prime is 12196901. The next prime is 12196949. The reversal of 12196921 is 12969121.

12196921 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6125625 + 6071296 = 2475^2 + 2464^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12196921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12196901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50280 + ... + 50521.

Almost surely, 2^12196921 is an apocalyptic number.

12196921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12196921 is a deficient number, since it is larger than the sum of its proper divisors (1209745).

12196921 is a wasteful number, since it uses less digits than its factorization.

12196921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100823 (or 100812 counting only the distinct ones).

The product of its digits is 1944, while the sum is 31.

The square root of 12196921 is about 3492.4090539340. The cubic root of 12196921 is about 230.1883837825.

The spelling of 12196921 in words is "twelve million, one hundred ninety-six thousand, nine hundred twenty-one".