202111112117 has 2 divisors, whose sum is σ = 202111112118. Its totient is φ = 202111112116.

The previous prime is 202111112101. The next prime is 202111112129. The reversal of 202111112117 is 711211111202.

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., 129225151441 + 72885960676 = 359479^2 + 269974^2 .

It is a cyclic number.

It is not a de Polignac number, because 202111112117 - 2⁴ = 202111112101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202111102117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055556058 + 101055556059.

It is an arithmetic number, because the mean of its divisors is an integer number (101055556059).

Almost surely, 2^202111112117 is an apocalyptic number.

It is an amenable number.

202111112117 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111112117 is an equidigital number, since it uses as much as digits as its factorization.

202111112117 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202111112117 its reverse (711211111202), we get a palindrome (913322223319).

The spelling of 202111112117 in words is "two hundred two billion, one hundred eleven million, one hundred twelve thousand, one hundred seventeen".