1213612512249 has 4 divisors (see below), whose sum is σ = 1618150016336. Its totient is φ = 809075008164.

The previous prime is 1213612512247. The next prime is 1213612512311. The reversal of 1213612512249 is 9422152163121.

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 not a de Polignac number, because 1213612512249 - 2¹ = 1213612512247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213612512247) 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, 202268752039 + ... + 202268752044.

It is an arithmetic number, because the mean of its divisors is an integer number (404537504084).

Almost surely, 2^{1213612512249} is an apocalyptic number.

It is an amenable number.

1213612512249 is a deficient number, since it is larger than the sum of its proper divisors (404537504087).

1213612512249 is an equidigital number, since it uses as much as digits as its factorization.

1213612512249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404537504086.

The product of its digits is 51840, while the sum is 39.

The spelling of 1213612512249 in words is "one trillion, two hundred thirteen billion, six hundred twelve million, five hundred twelve thousand, two hundred forty-nine".