211121201222011 has 2 divisors, whose sum is σ = 211121201222012. Its totient is φ = 211121201222010.

The previous prime is 211121201222003. The next prime is 211121201222047. The reversal of 211121201222011 is 110222102121112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211121201222011 - 2³ = 211121201222003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211121201222011.

It is not a weakly prime, because it can be changed into another prime (211121201222411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560600611005 + 105560600611006.

It is an arithmetic number, because the mean of its divisors is an integer number (105560600611006).

Almost surely, 2^{211121201222011} is an apocalyptic number.

211121201222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121201222011 is an equidigital number, since it uses as much as digits as its factorization.

211121201222011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211121201222011 its reverse (110222102121112), we get a palindrome (321343303343123).

The spelling of 211121201222011 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, eleven".