1213333601 has 4 divisors (see below), whose sum is σ = 1214103600. Its totient is φ = 1212563604.

The previous prime is 1213333577. The next prime is 1213333613. The reversal of 1213333601 is 1063333121.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1213333601 - 2¹⁰ = 1213332577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213333621) 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, 382631 + ... + 385788.

It is an arithmetic number, because the mean of its divisors is an integer number (303525900).

Almost surely, 2^1213333601 is an apocalyptic number.

It is an amenable number.

1213333601 is a deficient number, since it is larger than the sum of its proper divisors (769999).

1213333601 is an equidigital number, since it uses as much as digits as its factorization.

1213333601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769998.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1213333601 is about 34832.9384491174. The cubic root of 1213333601 is about 1066.5799324766.

Adding to 1213333601 its reverse (1063333121), we get a palindrome (2276666722).

The spelling of 1213333601 in words is "one billion, two hundred thirteen million, three hundred thirty-three thousand, six hundred one".