1201111117 has 2 divisors, whose sum is σ = 1201111118. Its totient is φ = 1201111116.

The previous prime is 1201111091. The next prime is 1201111123. The reversal of 1201111117 is 7111111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197921321 + 3189796 = 34611^2 + 1786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201111117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201111117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201111127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600555558 + 600555559.

It is an arithmetic number, because the mean of its divisors is an integer number (600555559).

Almost surely, 2^1201111117 is an apocalyptic number.

It is an amenable number.

1201111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201111117 is an equidigital number, since it uses as much as digits as its factorization.

1201111117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14, while the sum is 16.

The square root of 1201111117 is about 34657.0500331462. The cubic root of 1201111117 is about 1062.9864507830.

Adding to 1201111117 its reverse (7111111021), we get a palindrome (8312222138).

The spelling of 1201111117 in words is "one billion, two hundred one million, one hundred eleven thousand, one hundred seventeen".