1121100289 has 2 divisors, whose sum is σ = 1121100290. Its totient is φ = 1121100288.

The previous prime is 1121100193. The next prime is 1121100313. The reversal of 1121100289 is 9820011211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751691889 + 369408400 = 27417^2 + 19220^2 .

It is an emirp because it is prime and its reverse (9820011211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121100289 - 2²³ = 1112711681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121100389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560550144 + 560550145.

It is an arithmetic number, because the mean of its divisors is an integer number (560550145).

Almost surely, 2^1121100289 is an apocalyptic number.

It is an amenable number.

1121100289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121100289 is an equidigital number, since it uses as much as digits as its factorization.

1121100289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 1121100289 is about 33482.8357371355. The cubic root of 1121100289 is about 1038.8387831241.

It can be divided in two parts, 112 and 1100289, that added together give a square (1100401 = 1049²).

The spelling of 1121100289 in words is "one billion, one hundred twenty-one million, one hundred thousand, two hundred eighty-nine".