1213303601 has 4 divisors (see below), whose sum is σ = 1218602100. Its totient is φ = 1208005104.

The previous prime is 1213303589. The next prime is 1213303627. The reversal of 1213303601 is 1063033121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1063033121 = 31 ⋅34291391.

It can be written as a sum of positive squares in 2 ways, for example, as 694375201 + 518928400 = 26351^2 + 22780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213303601 is a prime.

It is a super-3 number, since 3×1213303601³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213303681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648906 + ... + 2649363.

It is an arithmetic number, because the mean of its divisors is an integer number (304650525).

Almost surely, 2^1213303601 is an apocalyptic number.

It is an amenable number.

1213303601 is a deficient number, since it is larger than the sum of its proper divisors (5298499).

1213303601 is an equidigital number, since it uses as much as digits as its factorization.

1213303601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298498.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1213303601 is about 34832.5078195642. The cubic root of 1213303601 is about 1066.5711419122.

Adding to 1213303601 its reverse (1063033121), we get a palindrome (2276336722).

The spelling of 1213303601 in words is "one billion, two hundred thirteen million, three hundred three thousand, six hundred one".