101222112210221 has 4 divisors (see below), whose sum is σ = 101222137316412. Its totient is φ = 101222087104032.

The previous prime is 101222112210187. The next prime is 101222112210227. The reversal of 101222112210221 is 122012211222101.

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 54508851426121 + 46713260784100 = 7383011^2 + 6834710^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222112210221 - 2²⁶ = 101222045101357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101222112210193 and 101222112210202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101222112210227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4984256 + ... + 15076041.

It is an arithmetic number, because the mean of its divisors is an integer number (25305534329103).

Almost surely, 2^{101222112210221} is an apocalyptic number.

It is an amenable number.

101222112210221 is a deficient number, since it is larger than the sum of its proper divisors (25106191).

101222112210221 is an equidigital number, since it uses as much as digits as its factorization.

101222112210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25106190.

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

Adding to 101222112210221 its reverse (122012211222101), we get a palindrome (223234323432322).

The spelling of 101222112210221 in words is "one hundred one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred ten thousand, two hundred twenty-one".