1242210122117 has 2 divisors, whose sum is σ = 1242210122118. Its totient is φ = 1242210122116.

The previous prime is 1242210122107. The next prime is 1242210122129. The reversal of 1242210122117 is 7112210122421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 949365717316 + 292844404801 = 974354^2 + 541151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242210122117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242210122107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621105061058 + 621105061059.

It is an arithmetic number, because the mean of its divisors is an integer number (621105061059).

Almost surely, 2^{1242210122117} is an apocalyptic number.

It is an amenable number.

1242210122117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242210122117 is an equidigital number, since it uses as much as digits as its factorization.

1242210122117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 1242210122117 its reverse (7112210122421), we get a palindrome (8354420244538).

The spelling of 1242210122117 in words is "one trillion, two hundred forty-two billion, two hundred ten million, one hundred twenty-two thousand, one hundred seventeen".