211221201102012 has 144 divisors (see below), whose sum is σ = 542685944586240. Its totient is φ = 69261467184000.

The previous prime is 211221201102001. The next prime is 211221201102083. The reversal of 211221201102012 is 210201102122112.

211221201102012 is a `hidden beast` number, since 211 + 22 + 120 + 110 + 201 + 2 = 666.

It is a super-2 number, since 2×211221201102012² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 384694437 + ... + 385243107.

It is an arithmetic number, because the mean of its divisors is an integer number (3768652392960).

Almost surely, 2^{211221201102012} is an apocalyptic number.

It is an amenable number.

211221201102012 is an abundant number, since it is smaller than the sum of its proper divisors (331464743484228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221201102012 is a wasteful number, since it uses less digits than its factorization.

211221201102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549464 (or 549459 counting only the distinct ones).

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

Adding to 211221201102012 its reverse (210201102122112), we get a palindrome (421422303224124).

The spelling of 211221201102012 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred one million, one hundred two thousand, twelve".