111202211022221 has 16 divisors (see below), whose sum is σ = 125540205024768. Its totient is φ = 97585429233600.

The previous prime is 111202211022173. The next prime is 111202211022289. The reversal of 111202211022221 is 122220112202111.

It is not a de Polignac number, because 111202211022221 - 2³⁰ = 111201137280397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111202211022193 and 111202211022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202211022521) 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 15 ways as a sum of consecutive naturals, for example, 410577710 + ... + 410848463.

It is an arithmetic number, because the mean of its divisors is an integer number (7846262814048).

Almost surely, 2^{111202211022221} is an apocalyptic number.

111202211022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111202211022221 is a deficient number, since it is larger than the sum of its proper divisors (14337994002547).

111202211022221 is a wasteful number, since it uses less digits than its factorization.

111202211022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821426612.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111202211022221 its reverse (122220112202111), we get a palindrome (233422323224332).

The spelling of 111202211022221 in words is "one hundred eleven trillion, two hundred two billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".