1225111141 has 2 divisors, whose sum is σ = 1225111142. Its totient is φ = 1225111140.

The previous prime is 1225111117. The next prime is 1225111157. The reversal of 1225111141 is 1411115221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1150634241 + 74476900 = 33921^2 + 8630^2 .

It is an emirp because it is prime and its reverse (1411115221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225111141 - 2¹⁵ = 1225078373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225111441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612555570 + 612555571.

It is an arithmetic number, because the mean of its divisors is an integer number (612555571).

Almost surely, 2^1225111141 is an apocalyptic number.

It is an amenable number.

1225111141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225111141 is an equidigital number, since it uses as much as digits as its factorization.

1225111141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 19.

The square root of 1225111141 is about 35001.5876925605. The cubic root of 1225111141 is about 1070.0198386283.

Adding to 1225111141 its reverse (1411115221), we get a palindrome (2636226362).

The spelling of 1225111141 in words is "one billion, two hundred twenty-five million, one hundred eleven thousand, one hundred forty-one".