211121221012011 has 12 divisors (see below), whose sum is σ = 304961114351088. Its totient is φ = 140743677802704.

The previous prime is 211121221012001. The next prime is 211121221012063. The reversal of 211121221012011 is 110210122121112.

It is a happy number.

211121221012011 is a `hidden beast` number, since 2 + 111 + 212 + 210 + 120 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-211121221012011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211121221012001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316554375 + ... + 317220608.

It is an arithmetic number, because the mean of its divisors is an integer number (25413426195924).

Almost surely, 2^{211121221012011} is an apocalyptic number.

211121221012011 is a deficient number, since it is larger than the sum of its proper divisors (93839893339077).

211121221012011 is a wasteful number, since it uses less digits than its factorization.

211121221012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633812002 (or 633811999 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211121221012011 its reverse (110210122121112), we get a palindrome (321331343133123).

The spelling of 211121221012011 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, eleven".