12921101 has 4 divisors (see below), whose sum is σ = 13482912. Its totient is φ = 12359292.

The previous prime is 12921091. The next prime is 12921119. The reversal of 12921101 is 10112921.

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 12921101 - 2¹⁸ = 12658957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12921101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921001) 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, 280871 + ... + 280916.

It is an arithmetic number, because the mean of its divisors is an integer number (3370728).

Almost surely, 2^12921101 is an apocalyptic number.

It is an amenable number.

12921101 is a deficient number, since it is larger than the sum of its proper divisors (561811).

12921101 is an equidigital number, since it uses as much as digits as its factorization.

12921101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561810.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 12921101 is about 3594.5933010565. The cubic root of 12921101 is about 234.6568161093.

The spelling of 12921101 in words is "twelve million, nine hundred twenty-one thousand, one hundred one".