1121320129 has 2 divisors, whose sum is σ = 1121320130. Its totient is φ = 1121320128.

The previous prime is 1121320091. The next prime is 1121320139. The reversal of 1121320129 is 9210231211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1085043600 + 36276529 = 32940^2 + 6023^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121320129 - 2¹⁷ = 1121189057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121320139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560660064 + 560660065.

It is an arithmetic number, because the mean of its divisors is an integer number (560660065).

Almost surely, 2^1121320129 is an apocalyptic number.

It is an amenable number.

1121320129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121320129 is an equidigital number, since it uses as much as digits as its factorization.

1121320129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1121320129 is about 33486.1184522781. The cubic root of 1121320129 is about 1038.9066817156.

The spelling of 1121320129 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, one hundred twenty-nine".