211121221020011 has 2 divisors, whose sum is σ = 211121221020012. Its totient is φ = 211121221020010.

The previous prime is 211121221019993. The next prime is 211121221020107. The reversal of 211121221020011 is 110020122121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211121221020011 - 2²² = 211121216825707 is a prime.

It is a super-4 number, since 4×211121221020011⁴ (a number of 58 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (211121224020011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560610510005 + 105560610510006.

It is an arithmetic number, because the mean of its divisors is an integer number (105560610510006).

Almost surely, 2^{211121221020011} is an apocalyptic number.

211121221020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121221020011 is an equidigital number, since it uses as much as digits as its factorization.

211121221020011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 211121221020011 its reverse (110020122121112), we get a palindrome (321141343141123).

The spelling of 211121221020011 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty thousand, eleven".