1121343161 has 2 divisors, whose sum is σ = 1121343162. Its totient is φ = 1121343160.

The previous prime is 1121343133. The next prime is 1121343199. The reversal of 1121343161 is 1613431211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119571600 + 1771561 = 33460^2 + 1331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121343161 - 2²⁶ = 1054234297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121343361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560671580 + 560671581.

It is an arithmetic number, because the mean of its divisors is an integer number (560671581).

Almost surely, 2^1121343161 is an apocalyptic number.

It is an amenable number.

1121343161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121343161 is an equidigital number, since it uses as much as digits as its factorization.

1121343161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 1121343161 is about 33486.4623542111. The cubic root of 1121343161 is about 1038.9137947408.

Adding to 1121343161 its reverse (1613431211), we get a palindrome (2734774372).

The spelling of 1121343161 in words is "one billion, one hundred twenty-one million, three hundred forty-three thousand, one hundred sixty-one".