1145221141 has 2 divisors, whose sum is σ = 1145221142. Its totient is φ = 1145221140.

The previous prime is 1145221109. The next prime is 1145221159. The reversal of 1145221141 is 1411225411.

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., 780029041 + 365192100 = 27929^2 + 19110^2 .

It is an emirp because it is prime and its reverse (1411225411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145221141 - 2⁵ = 1145221109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145221171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572610570 + 572610571.

It is an arithmetic number, because the mean of its divisors is an integer number (572610571).

Almost surely, 2^1145221141 is an apocalyptic number.

It is an amenable number.

1145221141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145221141 is an equidigital number, since it uses as much as digits as its factorization.

1145221141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 22.

The square root of 1145221141 is about 33841.1161311207. The cubic root of 1145221141 is about 1046.2363033302.

Adding to 1145221141 its reverse (1411225411), we get a palindrome (2556446552).

The spelling of 1145221141 in words is "one billion, one hundred forty-five million, two hundred twenty-one thousand, one hundred forty-one".