2121212011211 has 2 divisors, whose sum is σ = 2121212011212. Its totient is φ = 2121212011210.

The previous prime is 2121212011207. The next prime is 2121212011273. The reversal of 2121212011211 is 1121102121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121212011211 - 2² = 2121212011207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121212011211.

It is not a weakly prime, because it can be changed into another prime (2121212011201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060606005605 + 1060606005606.

It is an arithmetic number, because the mean of its divisors is an integer number (1060606005606).

Almost surely, 2^{2121212011211} is an apocalyptic number.

2121212011211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121212011211 is an equidigital number, since it uses as much as digits as its factorization.

2121212011211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2121212011211 its reverse (1121102121212), we get a palindrome (3242314132423).

The spelling of 2121212011211 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, eleven thousand, two hundred eleven".