222212101 has 4 divisors (see below), whose sum is σ = 222384204. Its totient is φ = 222040000.

The previous prime is 222212063. The next prime is 222212129. The reversal of 222212101 is 101212222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101212222 = 2 ⋅50606111.

It can be written as a sum of positive squares in 2 ways, for example, as 62821476 + 159390625 = 7926^2 + 12625^2 .

It is a cyclic number.

It is not a de Polignac number, because 222212101 - 2⁹ = 222211589 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 (222212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84100 + ... + 86701.

It is an arithmetic number, because the mean of its divisors is an integer number (55596051).

Almost surely, 2^222212101 is an apocalyptic number.

It is an amenable number.

222212101 is a deficient number, since it is larger than the sum of its proper divisors (172103).

222212101 is a wasteful number, since it uses less digits than its factorization.

222212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172102.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 222212101 is about 14906.7803700195. The cubic root of 222212101 is about 605.6976683971.

Adding to 222212101 its reverse (101212222), we get a palindrome (323424323).

The spelling of 222212101 in words is "two hundred twenty-two million, two hundred twelve thousand, one hundred one".