1234544011213 has 4 divisors (see below), whose sum is σ = 1234794379968. Its totient is φ = 1234293642460.

The previous prime is 1234544011199. The next prime is 1234544011219. The reversal of 1234544011213 is 3121104454321.

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 1234544011213 - 2⁹ = 1234544010701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234544011219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125176981 + ... + 125186842.

It is an arithmetic number, because the mean of its divisors is an integer number (308698594992).

Almost surely, 2^{1234544011213} is an apocalyptic number.

It is an amenable number.

1234544011213 is a deficient number, since it is larger than the sum of its proper divisors (250368755).

1234544011213 is an equidigital number, since it uses as much as digits as its factorization.

1234544011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250368754.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 1234544011213 its reverse (3121104454321), we get a palindrome (4355648465534).

The spelling of 1234544011213 in words is "one trillion, two hundred thirty-four billion, five hundred forty-four million, eleven thousand, two hundred thirteen".