212121000011210 has 16 divisors (see below), whose sum is σ = 381818430787176. Its totient is φ = 84848259834048.

The previous prime is 212121000011209. The next prime is 212121000011237. The reversal of 212121000011210 is 12110000121212.

It can be written as a sum of positive squares in 4 ways, for example, as 103769284731841 + 108351715279369 = 10186721^2 + 10409213^2 .

It is a super-3 number, since 3×212121000011210³ (a number of 44 digits) contains 333 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 11051657 + ... + 23374796.

Almost surely, 2^{212121000011210} is an apocalyptic number.

212121000011210 is a deficient number, since it is larger than the sum of its proper divisors (169697430775966).

212121000011210 is a wasteful number, since it uses less digits than its factorization.

212121000011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35042617.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212121000011210 its reverse (12110000121212), we get a palindrome (224231000132422).

The spelling of 212121000011210 in words is "two hundred twelve trillion, one hundred twenty-one billion, eleven thousand, two hundred ten".