1211020212211 has 2 divisors, whose sum is σ = 1211020212212. Its totient is φ = 1211020212210.

The previous prime is 1211020212209. The next prime is 1211020212257. The reversal of 1211020212211 is 1122120201121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211020212211 - 2¹ = 1211020212209 is a prime.

Together with 1211020212209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1211020212011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605510106105 + 605510106106.

It is an arithmetic number, because the mean of its divisors is an integer number (605510106106).

Almost surely, 2^{1211020212211} is an apocalyptic number.

1211020212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211020212211 is an equidigital number, since it uses as much as digits as its factorization.

1211020212211 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 16.

Adding to 1211020212211 its reverse (1122120201121), we get a palindrome (2333140413332).

The spelling of 1211020212211 in words is "one trillion, two hundred eleven billion, twenty million, two hundred twelve thousand, two hundred eleven".