222101101212121 has 2 divisors, whose sum is σ = 222101101212122. Its totient is φ = 222101101212120.

The previous prime is 222101101212101. The next prime is 222101101212131. The reversal of 222101101212121 is 121212101101222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164816426467225 + 57284674744896 = 12838085^2 + 7568664^2 .

It is a cyclic number.

It is not a de Polignac number, because 222101101212121 - 2¹⁷ = 222101101081049 is a prime.

It is not a weakly prime, because it can be changed into another prime (222101101212101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111050550606060 + 111050550606061.

It is an arithmetic number, because the mean of its divisors is an integer number (111050550606061).

Almost surely, 2^{222101101212121} is an apocalyptic number.

It is an amenable number.

222101101212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222101101212121 is an equidigital number, since it uses as much as digits as its factorization.

222101101212121 is an evil number, because the sum of its binary digits is even.

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

Adding to 222101101212121 its reverse (121212101101222), we get a palindrome (343313202313343).

It can be divided in two parts, 222101101 and 212121, that added together give a palindrome (222313222).

The spelling of 222101101212121 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred one million, two hundred twelve thousand, one hundred twenty-one".