221211220012211 has 16 divisors (see below), whose sum is σ = 262563731995488. Its totient is φ = 183718063180800.

The previous prime is 221211220012151. The next prime is 221211220012219. The reversal of 221211220012211 is 112210022112122.

It is a cyclic number.

It is not a de Polignac number, because 221211220012211 - 2¹⁸ = 221211219750067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211220012219) 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 15 ways as a sum of consecutive naturals, for example, 7973860400 + ... + 7973888141.

It is an arithmetic number, because the mean of its divisors is an integer number (16410233249718).

Almost surely, 2^{221211220012211} is an apocalyptic number.

221211220012211 is a deficient number, since it is larger than the sum of its proper divisors (41352511983277).

221211220012211 is a wasteful number, since it uses less digits than its factorization.

221211220012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947748662.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221211220012211 its reverse (112210022112122), we get a palindrome (333421242124333).

The spelling of 221211220012211 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twenty million, twelve thousand, two hundred eleven".