212121122011202 has 16 divisors (see below), whose sum is σ = 324894645262872. Its totient is φ = 103844116915200.

The previous prime is 212121122011157. The next prime is 212121122011207. The reversal of 212121122011202 is 202110221121212.

It can be written as a sum of positive squares in 4 ways, for example, as 197425008741601 + 14696113269601 = 14050801^2 + 3833551^2 .

It is not an unprimeable number, because it can be changed into a prime (212121122011207) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 5302477799 + ... + 5302517802.

Almost surely, 2^{212121122011202} is an apocalyptic number.

212121122011202 is a deficient number, since it is larger than the sum of its proper divisors (112773523251670).

212121122011202 is a wasteful number, since it uses less digits than its factorization.

212121122011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10604995813.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212121122011202 its reverse (202110221121212), we get a palindrome (414231343132414).

The spelling of 212121122011202 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred two".