221211112221211 has 8 divisors (see below), whose sum is σ = 252833033787104. Its totient is φ = 189594274181760.

The previous prime is 221211112221179. The next prime is 221211112221221. The reversal of 221211112221211 is 112122211112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221211112221211 - 2⁵ = 221211112221179 is a prime.

It is a super-3 number, since 3×221211112221211³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211112221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270788360 + ... + 1270962421.

It is an arithmetic number, because the mean of its divisors is an integer number (31604129223388).

Almost surely, 2^{221211112221211} is an apocalyptic number.

221211112221211 is a deficient number, since it is larger than the sum of its proper divisors (31621921565893).

221211112221211 is a wasteful number, since it uses less digits than its factorization.

221211112221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541763221.

The product of its digits is 128, while the sum is 22.

Adding to 221211112221211 its reverse (112122211112122), we get a palindrome (333333323333333).

The spelling of 221211112221211 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred eleven".