1212315513 has 16 divisors (see below), whose sum is σ = 1639020096. Its totient is φ = 796948160.

The previous prime is 1212315493. The next prime is 1212315521. The reversal of 1212315513 is 3155132121.

It is a cyclic number.

It is not a de Polignac number, because 1212315513 - 2⁹ = 1212315001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212315523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134323 + ... + 143063.

It is an arithmetic number, because the mean of its divisors is an integer number (102438756).

Almost surely, 2^1212315513 is an apocalyptic number.

It is an amenable number.

1212315513 is a deficient number, since it is larger than the sum of its proper divisors (426704583).

1212315513 is an equidigital number, since it uses as much as digits as its factorization.

1212315513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384.

The product of its digits is 900, while the sum is 24.

The square root of 1212315513 is about 34818.3215132493. The cubic root of 1212315513 is about 1066.2815325193.

Adding to 1212315513 its reverse (3155132121), we get a palindrome (4367447634).

The spelling of 1212315513 in words is "one billion, two hundred twelve million, three hundred fifteen thousand, five hundred thirteen".