1213413361 has 4 divisors (see below), whose sum is σ = 1215047232. Its totient is φ = 1211779492.

The previous prime is 1213413353. The next prime is 1213413367. The reversal of 1213413361 is 1633143121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1633143121 = 8093 ⋅201797.

It is a cyclic number.

It is not a de Polignac number, because 1213413361 - 2³ = 1213413353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213413367) 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, 815821 + ... + 817306.

It is an arithmetic number, because the mean of its divisors is an integer number (303761808).

Almost surely, 2^1213413361 is an apocalyptic number.

It is an amenable number.

1213413361 is a deficient number, since it is larger than the sum of its proper divisors (1633871).

1213413361 is an equidigital number, since it uses as much as digits as its factorization.

1213413361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633870.

The product of its digits is 1296, while the sum is 25.

The square root of 1213413361 is about 34834.0833236645. The cubic root of 1213413361 is about 1066.6033029526.

Adding to 1213413361 its reverse (1633143121), we get a palindrome (2846556482).

The spelling of 1213413361 in words is "one billion, two hundred thirteen million, four hundred thirteen thousand, three hundred sixty-one".