1212200111117 has 2 divisors, whose sum is σ = 1212200111118. Its totient is φ = 1212200111116.

The previous prime is 1212200111081. The next prime is 1212200111167. The reversal of 1212200111117 is 7111110022121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607816699876 + 604383411241 = 779626^2 + 777421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212200111117 - 2¹⁴ = 1212200094733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212200111167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606100055558 + 606100055559.

It is an arithmetic number, because the mean of its divisors is an integer number (606100055559).

Almost surely, 2^{1212200111117} is an apocalyptic number.

It is an amenable number.

1212200111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212200111117 is an equidigital number, since it uses as much as digits as its factorization.

1212200111117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 1212200111117 its reverse (7111110022121), we get a palindrome (8323310133238).

The spelling of 1212200111117 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred eleven thousand, one hundred seventeen".