111002210202221 has 4 divisors (see below), whose sum is σ = 119540841756252. Its totient is φ = 102463578648192.

The previous prime is 111002210202211. The next prime is 111002210202223. The reversal of 111002210202221 is 122202012200111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50644771512196 + 60357438690025 = 7116514^2 + 7769005^2 .

It is a cyclic number.

It is not a de Polignac number, because 111002210202221 - 2³⁸ = 110727332295277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111002210202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002210202223) 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, 4269315776996 + ... + 4269315777021.

It is an arithmetic number, because the mean of its divisors is an integer number (29885210439063).

Almost surely, 2^{111002210202221} is an apocalyptic number.

It is an amenable number.

111002210202221 is a deficient number, since it is larger than the sum of its proper divisors (8538631554031).

111002210202221 is an equidigital number, since it uses as much as digits as its factorization.

111002210202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8538631554030.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111002210202221 its reverse (122202012200111), we get a palindrome (233204222402332).

The spelling of 111002210202221 in words is "one hundred eleven trillion, two billion, two hundred ten million, two hundred two thousand, two hundred twenty-one".