1213434305515 has 4 divisors (see below), whose sum is σ = 1456121166624. Its totient is φ = 970747444408.

The previous prime is 1213434305513. The next prime is 1213434305561. The reversal of 1213434305515 is 5155034343121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213434305515 - 2¹ = 1213434305513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213434305513) 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, 121343430547 + ... + 121343430556.

It is an arithmetic number, because the mean of its divisors is an integer number (364030291656).

Almost surely, 2^{1213434305515} is an apocalyptic number.

1213434305515 is a deficient number, since it is larger than the sum of its proper divisors (242686861109).

1213434305515 is an equidigital number, since it uses as much as digits as its factorization.

1213434305515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242686861108.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 1213434305515 its reverse (5155034343121), we get a palindrome (6368468648636).

The spelling of 1213434305515 in words is "one trillion, two hundred thirteen billion, four hundred thirty-four million, three hundred five thousand, five hundred fifteen".