221220211020211 has 32 divisors (see below), whose sum is σ = 249690411371520. Its totient is φ = 194464479369600.

The previous prime is 221220211020209. The next prime is 221220211020223. The reversal of 221220211020211 is 112020112022122.

It is a cyclic number.

It is not a de Polignac number, because 221220211020211 - 2¹ = 221220211020209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221220211020271) 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, 2568372616 + ... + 2568458746.

It is an arithmetic number, because the mean of its divisors is an integer number (7802825355360).

Almost surely, 2^{221220211020211} is an apocalyptic number.

221220211020211 is a deficient number, since it is larger than the sum of its proper divisors (28470200351309).

221220211020211 is a wasteful number, since it uses less digits than its factorization.

221220211020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123907.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221220211020211 its reverse (112020112022122), we get a palindrome (333240323042333).

The spelling of 221220211020211 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred eleven million, twenty thousand, two hundred eleven".