1225111117 has 2 divisors, whose sum is σ = 1225111118. Its totient is φ = 1225111116.

The previous prime is 1225111099. The next prime is 1225111141. The reversal of 1225111117 is 7111115221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1095014281 + 130096836 = 33091^2 + 11406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225111117 - 2¹⁹ = 1224586829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225111157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612555558 + 612555559.

It is an arithmetic number, because the mean of its divisors is an integer number (612555559).

Almost surely, 2^1225111117 is an apocalyptic number.

It is an amenable number.

1225111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225111117 is an equidigital number, since it uses as much as digits as its factorization.

1225111117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 140, while the sum is 22.

The square root of 1225111117 is about 35001.5873497189. The cubic root of 1225111117 is about 1070.0198316411.

Adding to 1225111117 its reverse (7111115221), we get a palindrome (8336226338).

The spelling of 1225111117 in words is "one billion, two hundred twenty-five million, one hundred eleven thousand, one hundred seventeen".