1111131289 has 2 divisors, whose sum is σ = 1111131290. Its totient is φ = 1111131288.

The previous prime is 1111131257. The next prime is 1111131299. The reversal of 1111131289 is 9821311111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1094484889 + 16646400 = 33083^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111131289 - 2⁵ = 1111131257 is a prime.

It is a super-2 number, since 2×1111131289² = 2469225482789603042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1111131299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555565644 + 555565645.

It is an arithmetic number, because the mean of its divisors is an integer number (555565645).

Almost surely, 2^1111131289 is an apocalyptic number.

It is an amenable number.

1111131289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111131289 is an equidigital number, since it uses as much as digits as its factorization.

1111131289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 28.

The square root of 1111131289 is about 33333.6360002926. The cubic root of 1111131289 is about 1035.7504383526.

The spelling of 1111131289 in words is "one billion, one hundred eleven million, one hundred thirty-one thousand, two hundred eighty-nine".