221112210212101 has 8 divisors (see below), whose sum is σ = 238121932771800. Its totient is φ = 204102643510272.

The previous prime is 221112210212083. The next prime is 221112210212107. The reversal of 221112210212101 is 101212012211122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12837494873025 + 208274715339076 = 3582945^2 + 14431726^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-221112210212101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112210212107) 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, 36009676 + ... + 41700373.

It is an arithmetic number, because the mean of its divisors is an integer number (29765241596475).

Almost surely, 2^{221112210212101} is an apocalyptic number.

It is an amenable number.

221112210212101 is a deficient number, since it is larger than the sum of its proper divisors (17009722559699).

221112210212101 is a wasteful number, since it uses less digits than its factorization.

221112210212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77928935.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221112210212101 its reverse (101212012211122), we get a palindrome (322324222423223).

The spelling of 221112210212101 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred twelve thousand, one hundred one".