1212212120211 has 20 divisors (see below), whose sum is σ = 1869249438144. Its totient is φ = 782072334000.

The previous prime is 1212212120209. The next prime is 1212212120221. The reversal of 1212212120211 is 1120212122121.

1212212120211 is a `hidden beast` number, since 1 + 21 + 221 + 212 + 0 + 211 = 666.

It is not a de Polignac number, because 1212212120211 - 2¹ = 1212212120209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212212120221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 241377840 + ... + 241382861.

Almost surely, 2^{1212212120211} is an apocalyptic number.

1212212120211 is a deficient number, since it is larger than the sum of its proper divisors (657037317933).

1212212120211 is an equidigital number, since it uses as much as digits as its factorization.

1212212120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482760744 (or 482760735 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212212120211 its reverse (1120212122121), we get a palindrome (2332424242332).

The spelling of 1212212120211 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred twenty thousand, two hundred eleven".