211021002120011 has 16 divisors (see below), whose sum is σ = 215163915632640. Its totient is φ = 206884079906400.

The previous prime is 211021002119969. The next prime is 211021002120031. The reversal of 211021002120011 is 110021200120112.

It is a cyclic number.

It is not a de Polignac number, because 211021002120011 - 2¹⁸ = 211021001857867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021002120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1954731086 + ... + 1954839036.

It is an arithmetic number, because the mean of its divisors is an integer number (13447744727040).

Almost surely, 2^{211021002120011} is an apocalyptic number.

211021002120011 is a deficient number, since it is larger than the sum of its proper divisors (4142913512629).

211021002120011 is a wasteful number, since it uses less digits than its factorization.

211021002120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135346.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211021002120011 its reverse (110021200120112), we get a palindrome (321042202240123).

The spelling of 211021002120011 in words is "two hundred eleven trillion, twenty-one billion, two million, one hundred twenty thousand, eleven".