1201121513 has 2 divisors, whose sum is σ = 1201121514. Its totient is φ = 1201121512.

The previous prime is 1201121503. The next prime is 1201121521. The reversal of 1201121513 is 3151211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200137449 + 984064 = 34643^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201121513 - 2¹² = 1201117417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201121491 and 1201121500.

It is not a weakly prime, because it can be changed into another prime (1201121503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600560756 + 600560757.

It is an arithmetic number, because the mean of its divisors is an integer number (600560757).

Almost surely, 2^1201121513 is an apocalyptic number.

It is an amenable number.

1201121513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201121513 is an equidigital number, since it uses as much as digits as its factorization.

1201121513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1201121513 is about 34657.2000167353. The cubic root of 1201121513 is about 1062.9895176032.

Adding to 1201121513 its reverse (3151211021), we get a palindrome (4352332534).

The spelling of 1201121513 in words is "one billion, two hundred one million, one hundred twenty-one thousand, five hundred thirteen".