212121002011 has 2 divisors, whose sum is σ = 212121002012. Its totient is φ = 212121002010.

The previous prime is 212121001999. The next prime is 212121002033. The reversal of 212121002011 is 110200121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212121002011 - 2³⁵ = 177761263643 is a prime.

It is a super-3 number, since 3×212121002011³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212121001982 and 212121002000.

It is not a weakly prime, because it can be changed into another prime (212121003011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060501005 + 106060501006.

It is an arithmetic number, because the mean of its divisors is an integer number (106060501006).

Almost surely, 2^212121002011 is an apocalyptic number.

212121002011 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121002011 is an equidigital number, since it uses as much as digits as its factorization.

212121002011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212121002011 its reverse (110200121212), we get a palindrome (322321123223).

The spelling of 212121002011 in words is "two hundred twelve billion, one hundred twenty-one million, two thousand, eleven".