111222101021 has 8 divisors (see below), whose sum is σ = 112893499224. Its totient is φ = 109561883200.

The previous prime is 111222100999. The next prime is 111222101057. The reversal of 111222101021 is 120101222111.

It can be written as a sum of positive squares in 4 ways, for example, as 50108822500 + 61113278521 = 223850^2 + 247211^2 .

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 111222101021 - 2¹⁰ = 111222099997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111222100987 and 111222101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222101821) 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, 2775050 + ... + 2814843.

It is an arithmetic number, because the mean of its divisors is an integer number (14111687403).

Almost surely, 2^111222101021 is an apocalyptic number.

It is an amenable number.

111222101021 is a deficient number, since it is larger than the sum of its proper divisors (1671398203).

111222101021 is a wasteful number, since it uses less digits than its factorization.

111222101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590191.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111222101021 its reverse (120101222111), we get a palindrome (231323323132).

The spelling of 111222101021 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred one thousand, twenty-one".