212121012222211 has 32 divisors (see below), whose sum is σ = 224928956736000. Its totient is φ = 199480058249472.

The previous prime is 212121012222187. The next prime is 212121012222269. The reversal of 212121012222211 is 112222210121212.

It is a cyclic number.

It is not a de Polignac number, because 212121012222211 - 2³⁵ = 212086652483843 is a prime.

It is a super-3 number, since 3×212121012222211³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121012220211) 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, 16916893980 + ... + 16916906518.

It is an arithmetic number, because the mean of its divisors is an integer number (7029029898000).

Almost surely, 2^{212121012222211} is an apocalyptic number.

212121012222211 is a deficient number, since it is larger than the sum of its proper divisors (12807944513789).

212121012222211 is a wasteful number, since it uses less digits than its factorization.

212121012222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17851.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212121012222211 its reverse (112222210121212), we get a palindrome (324343222343423).

The spelling of 212121012222211 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve million, two hundred twenty-two thousand, two hundred eleven".