212121220000101 has 16 divisors (see below), whose sum is σ = 284303686399296. Its totient is φ = 140676501482496.

The previous prime is 212121220000073. The next prime is 212121220000103. The reversal of 212121220000101 is 101000022121212.

It is not a de Polignac number, because 212121220000101 - 2⁹ = 212121219999589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121220000103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10156951 + ... + 22965323.

It is an arithmetic number, because the mean of its divisors is an integer number (17768980399956).

Almost surely, 2^{212121220000101} is an apocalyptic number.

It is an amenable number.

212121220000101 is a deficient number, since it is larger than the sum of its proper divisors (72182466399195).

212121220000101 is a wasteful number, since it uses less digits than its factorization.

212121220000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12837172.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212121220000101 its reverse (101000022121212), we get a palindrome (313121242121313).

The spelling of 212121220000101 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred one", and thus it is an aban number.