201212221221202 has 4 divisors (see below), whose sum is σ = 301818331831806. Its totient is φ = 100606110610600.

The previous prime is 201212221221191. The next prime is 201212221221257. The reversal of 201212221221202 is 202122122212102.

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., 107850073537921 + 93362147683281 = 10385089^2 + 9662409^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50303055305299 + ... + 50303055305302.

Almost surely, 2^{201212221221202} is an apocalyptic number.

201212221221202 is a deficient number, since it is larger than the sum of its proper divisors (100606110610604).

201212221221202 is a wasteful number, since it uses less digits than its factorization.

201212221221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100606110610603.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 201212221221202 its reverse (202122122212102), we get a palindrome (403334343433304).

The spelling of 201212221221202 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred two".