1222404212 has 24 divisors (see below), whose sum is σ = 2163377160. Its totient is φ = 604313600.

The previous prime is 1222404203. The next prime is 1222404221. The reversal of 1222404212 is 2124042221.

It is an interprime number because it is at equal distance from previous prime (1222404203) and next prime (1222404221).

It can be written as a sum of positive squares in 4 ways, for example, as 346480996 + 875923216 = 18614^2 + 29596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373688 + ... + 376944.

It is an arithmetic number, because the mean of its divisors is an integer number (90140715).

Almost surely, 2^1222404212 is an apocalyptic number.

It is an amenable number.

1222404212 is a deficient number, since it is larger than the sum of its proper divisors (940972948).

1222404212 is a wasteful number, since it uses less digits than its factorization.

1222404212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291 (or 4289 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1222404212 is about 34962.8976487934. The cubic root of 1222404212 is about 1069.2311744976.

Adding to 1222404212 its reverse (2124042221), we get a palindrome (3346446433).

The spelling of 1222404212 in words is "one billion, two hundred twenty-two million, four hundred four thousand, two hundred twelve".