201212202122213 has 4 divisors (see below), whose sum is σ = 201214006940748. Its totient is φ = 201210397303680.

The previous prime is 201212202122203. The next prime is 201212202122227. The reversal of 201212202122213 is 312221202212102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6619104308644 + 194593097813569 = 2572762^2 + 13949663^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212202122213 - 2⁶ = 201212202122149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212202122203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902242028 + ... + 902465013.

It is an arithmetic number, because the mean of its divisors is an integer number (50303501735187).

Almost surely, 2^{201212202122213} is an apocalyptic number.

It is an amenable number.

201212202122213 is a deficient number, since it is larger than the sum of its proper divisors (1804818535).

201212202122213 is a wasteful number, since it uses less digits than its factorization.

201212202122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804818534.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 201212202122213 its reverse (312221202212102), we get a palindrome (513433404334315).

The spelling of 201212202122213 in words is "two hundred one trillion, two hundred twelve billion, two hundred two million, one hundred twenty-two thousand, two hundred thirteen".