222121117 has 2 divisors, whose sum is σ = 222121118. Its totient is φ = 222121116.

The previous prime is 222121093. The next prime is 222121129. The reversal of 222121117 is 711121222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212751396 + 9369721 = 14586^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121117 - 2¹¹ = 222119069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222121094 and 222121103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060558 + 111060559.

It is an arithmetic number, because the mean of its divisors is an integer number (111060559).

Almost surely, 2^222121117 is an apocalyptic number.

It is an amenable number.

222121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121117 is an equidigital number, since it uses as much as digits as its factorization.

222121117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112, while the sum is 19.

The square root of 222121117 is about 14903.7282919409. The cubic root of 222121117 is about 605.6149901519.

Adding to 222121117 its reverse (711121222), we get a palindrome (933242339).

The spelling of 222121117 in words is "two hundred twenty-two million, one hundred twenty-one thousand, one hundred seventeen".