111101001022221 has 8 divisors (see below), whose sum is σ = 169296763462464. Its totient is φ = 63486286298400.

The previous prime is 111101001022181. The next prime is 111101001022259. The reversal of 111101001022221 is 122220100101111.

It is a happy number.

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

It is not a de Polignac number, because 111101001022221 - 2⁶ = 111101001022157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111101001022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101001022261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645261929080 + ... + 2645261929121.

It is an arithmetic number, because the mean of its divisors is an integer number (21162095432808).

Almost surely, 2^{111101001022221} is an apocalyptic number.

It is an amenable number.

111101001022221 is a deficient number, since it is larger than the sum of its proper divisors (58195762440243).

111101001022221 is an equidigital number, since it uses as much as digits as its factorization.

111101001022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290523858211.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111101001022221 its reverse (122220100101111), we get a palindrome (233321101123332).

The spelling of 111101001022221 in words is "one hundred eleven trillion, one hundred one billion, one million, twenty-two thousand, two hundred twenty-one".