212121000100211 has 32 divisors (see below), whose sum is σ = 225608818613760. Its totient is φ = 198869571622656.

The previous prime is 212121000100189. The next prime is 212121000100351. The reversal of 212121000100211 is 112001000121212.

It is a cyclic number.

It is not a de Polignac number, because 212121000100211 - 2⁴⁶ = 141752255922547 is a prime.

It is a super-3 number, since 3×212121000100211³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121003100211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12443295290 + ... + 12443312336.

It is an arithmetic number, because the mean of its divisors is an integer number (7050275581680).

Almost surely, 2^{212121000100211} is an apocalyptic number.

212121000100211 is a deficient number, since it is larger than the sum of its proper divisors (13487818513549).

212121000100211 is a wasteful number, since it uses less digits than its factorization.

212121000100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23243.

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

Adding to 212121000100211 its reverse (112001000121212), we get a palindrome (324122000221423).

The spelling of 212121000100211 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred thousand, two hundred eleven".