12220402 has 4 divisors (see below), whose sum is σ = 18330606. Its totient is φ = 6110200.

The previous prime is 12220393. The next prime is 12220421. The reversal of 12220402 is 20402221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12117361 + 103041 = 3481^2 + 321^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055099 + ... + 3055102.

Almost surely, 2^12220402 is an apocalyptic number.

12220402 is a deficient number, since it is larger than the sum of its proper divisors (6110204).

12220402 is an equidigital number, since it uses as much as digits as its factorization.

12220402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110203.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12220402 is about 3495.7691571384. The cubic root of 12220402 is about 230.3360054273.

Adding to 12220402 its reverse (20402221), we get a palindrome (32622623).

The spelling of 12220402 in words is "twelve million, two hundred twenty thousand, four hundred two".