1121013613 has 2 divisors, whose sum is σ = 1121013614. Its totient is φ = 1121013612.

The previous prime is 1121013563. The next prime is 1121013631. The reversal of 1121013613 is 3163101211.

Together with next prime (1121013631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743216644 + 377796969 = 27262^2 + 19437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121013613 - 2¹⁷ = 1120882541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121011613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560506806 + 560506807.

It is an arithmetic number, because the mean of its divisors is an integer number (560506807).

Almost surely, 2^1121013613 is an apocalyptic number.

It is an amenable number.

1121013613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121013613 is an equidigital number, since it uses as much as digits as its factorization.

1121013613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1121013613 is about 33481.5413773022. The cubic root of 1121013613 is about 1038.8120104045.

Adding to 1121013613 its reverse (3163101211), we get a palindrome (4284114824).

The spelling of 1121013613 in words is "one billion, one hundred twenty-one million, thirteen thousand, six hundred thirteen".