221112222112101 has 4 divisors (see below), whose sum is σ = 294816296149472. Its totient is φ = 147408148074732.

The previous prime is 221112222112091. The next prime is 221112222112253. The reversal of 221112222112101 is 101211222211122.

221112222112101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221112222112101 - 2¹¹ = 221112222110053 is a prime.

It is a super-2 number, since 2×221112222112101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112222112501) 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, 36852037018681 + ... + 36852037018686.

It is an arithmetic number, because the mean of its divisors is an integer number (73704074037368).

Almost surely, 2^{221112222112101} is an apocalyptic number.

It is an amenable number.

221112222112101 is a deficient number, since it is larger than the sum of its proper divisors (73704074037371).

221112222112101 is an equidigital number, since it uses as much as digits as its factorization.

221112222112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73704074037370.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221112222112101 its reverse (101211222211122), we get a palindrome (322323444323223).

The spelling of 221112222112101 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, one hundred one".