211110111011221 has 8 divisors (see below), whose sum is σ = 211681654743200. Its totient is φ = 210538899481680.

The previous prime is 211110111011209. The next prime is 211110111011249. The reversal of 211110111011221 is 122110111011112.

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

It is a cyclic number.

It is not a de Polignac number, because 211110111011221 - 2³³ = 211101521076629 is a prime.

It is a super-2 number, since 2×211110111011221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211110111011195 and 211110111011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211110111011321) 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 7 ways as a sum of consecutive naturals, for example, 81777891 + ... + 84319888.

It is an arithmetic number, because the mean of its divisors is an integer number (26460206842900).

Almost surely, 2^{211110111011221} is an apocalyptic number.

It is an amenable number.

211110111011221 is a deficient number, since it is larger than the sum of its proper divisors (571543731979).

211110111011221 is a wasteful number, since it uses less digits than its factorization.

211110111011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166101219.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 211110111011221 its reverse (122110111011112), we get a palindrome (333220222022333).

The spelling of 211110111011221 in words is "two hundred eleven trillion, one hundred ten billion, one hundred eleven million, eleven thousand, two hundred twenty-one".