12402211 has 4 divisors (see below), whose sum is σ = 12409632. Its totient is φ = 12394792.

The previous prime is 12402191. The next prime is 12402217. The reversal of 12402211 is 11220421.

It is a happy number.

12402211 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11220421 = 503 ⋅22307.

It is a cyclic number.

It is not a de Polignac number, because 12402211 - 2⁵ = 12402179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12402191 and 12402200.

It is not an unprimeable number, because it can be changed into a prime (12402217) 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, 105 + ... + 4981.

It is an arithmetic number, because the mean of its divisors is an integer number (3102408).

Almost surely, 2^12402211 is an apocalyptic number.

12402211 is a deficient number, since it is larger than the sum of its proper divisors (7421).

12402211 is an equidigital number, since it uses as much as digits as its factorization.

12402211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7420.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12402211 is about 3521.6772992425. The cubic root of 12402211 is about 231.4726615071.

Adding to 12402211 its reverse (11220421), we get a palindrome (23622632).

The spelling of 12402211 in words is "twelve million, four hundred two thousand, two hundred eleven".