1121520313 has 2 divisors, whose sum is σ = 1121520314. Its totient is φ = 1121520312.

The previous prime is 1121520307. The next prime is 1121520329. The reversal of 1121520313 is 3130251211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763251129 + 358269184 = 27627^2 + 18928^2 .

It is an emirp because it is prime and its reverse (3130251211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121520313 - 2²¹ = 1119423161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121520343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560760156 + 560760157.

It is an arithmetic number, because the mean of its divisors is an integer number (560760157).

Almost surely, 2^1121520313 is an apocalyptic number.

It is an amenable number.

1121520313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121520313 is an equidigital number, since it uses as much as digits as its factorization.

1121520313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1121520313 is about 33489.1073783701. The cubic root of 1121520313 is about 1038.9685017421.

Adding to 1121520313 its reverse (3130251211), we get a palindrome (4251771524).

The spelling of 1121520313 in words is "one billion, one hundred twenty-one million, five hundred twenty thousand, three hundred thirteen".