211221212200011 has 48 divisors (see below), whose sum is σ = 333960169452000. Its totient is φ = 127848553666560.

The previous prime is 211221212199989. The next prime is 211221212200067. The reversal of 211221212200011 is 110002212122112.

211221212200011 is a `hidden beast` number, since 21 + 1 + 221 + 212 + 200 + 0 + 11 = 666.

It is not a de Polignac number, because 211221212200011 - 2⁶ = 211221212199947 is a prime.

It is a super-2 number, since 2×211221212200011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221212205011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 341889115 + ... + 342506363.

It is an arithmetic number, because the mean of its divisors is an integer number (6957503530250).

Almost surely, 2^{211221212200011} is an apocalyptic number.

211221212200011 is a deficient number, since it is larger than the sum of its proper divisors (122738957251989).

211221212200011 is a wasteful number, since it uses less digits than its factorization.

211221212200011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665276 (or 665273 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211221212200011 its reverse (110002212122112), we get a palindrome (321223424322123).

The spelling of 211221212200011 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred thousand, eleven".