221112210212111 has 4 divisors (see below), whose sum is σ = 221224279251192. Its totient is φ = 221000141173032.

The previous prime is 221112210212107. The next prime is 221112210212183. The reversal of 221112210212111 is 111212012211122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221112210212111 - 2² = 221112210212107 is a prime.

It is a super-2 number, since 2×221112210212111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112210512111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56034516581 + ... + 56034520526.

It is an arithmetic number, because the mean of its divisors is an integer number (55306069812798).

Almost surely, 2^{221112210212111} is an apocalyptic number.

221112210212111 is a deficient number, since it is larger than the sum of its proper divisors (112069039081).

221112210212111 is a wasteful number, since it uses less digits than its factorization.

221112210212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112069039080.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 221112210212111 its reverse (111212012211122), we get a palindrome (332324222423233).

The spelling of 221112210212111 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred twelve thousand, one hundred eleven".