1131121 has 2 divisors, whose sum is σ = 1131122. Its totient is φ = 1131120.

The previous prime is 1131113. The next prime is 1131131. The reversal of 1131121 is 1211311.

It is an a-pointer prime, because the next prime (1131131) can be obtained adding 1131121 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876096 + 255025 = 936^2 + 505^2 .

It is an emirp because it is prime and its reverse (1211311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131121 - 2³ = 1131113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131098 and 1131107.

It is not a weakly prime, because it can be changed into another prime (1131131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565560 + 565561.

It is an arithmetic number, because the mean of its divisors is an integer number (565561).

2^1131121 is an apocalyptic number.

It is an amenable number.

1131121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131121 is an equidigital number, since it uses as much as digits as its factorization.

1131121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6, while the sum is 10.

The square root of 1131121 is about 1063.5417246164. The cubic root of 1131121 is about 104.1924751696.

Adding to 1131121 its reverse (1211311), we get a palindrome (2342432).

The spelling of 1131121 in words is "one million, one hundred thirty-one thousand, one hundred twenty-one".