202211101112221 has 4 divisors (see below), whose sum is σ = 202280422713052. Its totient is φ = 202141779511392.

The previous prime is 202211101112159. The next prime is 202211101112287. The reversal of 202211101112221 is 122211101112202.

It is a happy number.

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 197032063049721 + 5179038062500 = 14036811^2 + 2275750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202211101112221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202211101112821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34660796040 + ... + 34660801873.

It is an arithmetic number, because the mean of its divisors is an integer number (50570105678263).

Almost surely, 2^{202211101112221} is an apocalyptic number.

It is an amenable number.

202211101112221 is a deficient number, since it is larger than the sum of its proper divisors (69321600831).

202211101112221 is an equidigital number, since it uses as much as digits as its factorization.

202211101112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69321600830.

The product of its (nonzero) digits is 64, while the sum is 19.

Subtracting from 202211101112221 its sum of digits (19), we obtain a palindrome (202211101112202).

Adding to 202211101112221 its reverse (122211101112202), we get a palindrome (324422202224423).

The spelling of 202211101112221 in words is "two hundred two trillion, two hundred eleven billion, one hundred one million, one hundred twelve thousand, two hundred twenty-one".