1121248013 has 2 divisors, whose sum is σ = 1121248014. Its totient is φ = 1121248012.

The previous prime is 1121248001. The next prime is 1121248031. The reversal of 1121248013 is 3108421211.

1121248013 = 23677² + 23678².

Together with next prime (1121248031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 560647684 + 560600329 = 23678^2 + 23677^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121248013 - 2⁶ = 1121247949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121248013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121248043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560624006 + 560624007.

It is an arithmetic number, because the mean of its divisors is an integer number (560624007).

Almost surely, 2^1121248013 is an apocalyptic number.

1121248013 is the 23678-th centered square number.

It is an amenable number.

1121248013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121248013 is an equidigital number, since it uses as much as digits as its factorization.

1121248013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1121248013 is about 33485.0416305550. The cubic root of 1121248013 is about 1038.8844093367.

Adding to 1121248013 its reverse (3108421211), we get a palindrome (4229669224).

The spelling of 1121248013 in words is "one billion, one hundred twenty-one million, two hundred forty-eight thousand, thirteen".