221212012100211 has 32 divisors (see below), whose sum is σ = 357515447731200. Its totient is φ = 134067479343840.

The previous prime is 221212012100203. The next prime is 221212012100251. The reversal of 221212012100211 is 112001210212122.

221212012100211 is a `hidden beast` number, since 2 + 21 + 21 + 201 + 210 + 0 + 211 = 666.

It is not a de Polignac number, because 221212012100211 - 2³ = 221212012100203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212012100251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118047670 + ... + 119906948.

It is an arithmetic number, because the mean of its divisors is an integer number (11172357741600).

Almost surely, 2^{221212012100211} is an apocalyptic number.

221212012100211 is a deficient number, since it is larger than the sum of its proper divisors (136303435630989).

221212012100211 is a wasteful number, since it uses less digits than its factorization.

221212012100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259896 (or 2259890 counting only the distinct ones).

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

Adding to 221212012100211 its reverse (112001210212122), we get a palindrome (333213222312333).

The spelling of 221212012100211 in words is "two hundred twenty-one trillion, two hundred twelve billion, twelve million, one hundred thousand, two hundred eleven".