1213003532513 has 4 divisors (see below), whose sum is σ = 1233562914480. Its totient is φ = 1192444150548.

The previous prime is 1213003532423. The next prime is 1213003532537. The reversal of 1213003532513 is 3152353003121.

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 1213003532513 - 2²² = 1212999338209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213003532563) 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 in 3 ways as a sum of consecutive naturals, for example, 10279690895 + ... + 10279691012.

It is an arithmetic number, because the mean of its divisors is an integer number (308390728620).

Almost surely, 2^{1213003532513} is an apocalyptic number.

It is an amenable number.

1213003532513 is a deficient number, since it is larger than the sum of its proper divisors (20559381967).

1213003532513 is an equidigital number, since it uses as much as digits as its factorization.

1213003532513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20559381966.

The product of its (nonzero) digits is 8100, while the sum is 29.

Adding to 1213003532513 its reverse (3152353003121), we get a palindrome (4365356535634).

The spelling of 1213003532513 in words is "one trillion, two hundred thirteen billion, three million, five hundred thirty-two thousand, five hundred thirteen".