402221212 has 6 divisors (see below), whose sum is σ = 703887128. Its totient is φ = 201110604.

The previous prime is 402221189. The next prime is 402221257. The reversal of 402221212 is 212122204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50277648 + ... + 50277655.

Almost surely, 2^402221212 is an apocalyptic number.

It is an amenable number.

402221212 is a deficient number, since it is larger than the sum of its proper divisors (301665916).

402221212 is a wasteful number, since it uses less digits than its factorization.

402221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100555307 (or 100555305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 402221212 is about 20055.4534229471. The cubic root of 402221212 is about 738.1676188425.

Adding to 402221212 its reverse (212122204), we get a palindrome (614343416).

The spelling of 402221212 in words is "four hundred two million, two hundred twenty-one thousand, two hundred twelve".