212221202 has 6 divisors (see below), whose sum is σ = 318362709. Its totient is φ = 106100300.

The previous prime is 212221181. The next prime is 212221223. The reversal of 212221202 is 202122212.

It is an interprime number because it is at equal distance from previous prime (212221181) and next prime (212221223).

It can be written as a sum of positive squares in 2 ways, for example, as 146918641 + 65302561 = 12121^2 + 8081^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10301.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15452 + ... + 25752.

Almost surely, 2^212221202 is an apocalyptic number.

212221202 is a deficient number, since it is larger than the sum of its proper divisors (106141507).

212221202 is an frugal number, since it uses more digits than its factorization.

212221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20604 (or 10303 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 212221202 is about 14567.8139060053. The cubic root of 212221202 is about 596.4805086298.

Adding to 212221202 its reverse (202122212), we get a palindrome (414343414).

The spelling of 212221202 in words is "two hundred twelve million, two hundred twenty-one thousand, two hundred two".