2121212011 has 2 divisors, whose sum is σ = 2121212012. Its totient is φ = 2121212010.

The previous prime is 2121211997. The next prime is 2121212021. The reversal of 2121212011 is 1102121212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121212011 - 2¹⁵ = 2121179243 is a prime.

It is a super-2 number, since 2×2121212011² = 8999080791221328242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121211982 and 2121212000.

It is not a weakly prime, because it can be changed into another prime (2121212021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060606005 + 1060606006.

It is an arithmetic number, because the mean of its divisors is an integer number (1060606006).

Almost surely, 2^2121212011 is an apocalyptic number.

2121212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121212011 is an equidigital number, since it uses as much as digits as its factorization.

2121212011 is an evil number, because the sum of its binary digits is even.

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

The square root of 2121212011 is about 46056.6174506987. The cubic root of 2121212011 is about 1284.8764204613.

Adding to 2121212011 its reverse (1102121212), we get a palindrome (3223333223).

The spelling of 2121212011 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, eleven".