221212022211 has 12 divisors (see below), whose sum is σ = 328164381792. Its totient is φ = 143488879056.

The previous prime is 221212022201. The next prime is 221212022263. The reversal of 221212022211 is 112220212122.

It is a happy number.

221212022211 is a `hidden beast` number, since 221 + 21 + 202 + 221 + 1 = 666.

It is not a de Polignac number, because 221212022211 - 2⁹ = 221212021699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212022201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332149851 + ... + 332150516.

It is an arithmetic number, because the mean of its divisors is an integer number (27347031816).

Almost surely, 2^221212022211 is an apocalyptic number.

221212022211 is a deficient number, since it is larger than the sum of its proper divisors (106952359581).

221212022211 is a wasteful number, since it uses less digits than its factorization.

221212022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664300410 (or 664300407 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221212022211 its reverse (112220212122), we get a palindrome (333432234333).

The spelling of 221212022211 in words is "two hundred twenty-one billion, two hundred twelve million, twenty-two thousand, two hundred eleven".