1213523450011 has 4 divisors (see below), whose sum is σ = 1219621558000. Its totient is φ = 1207425342024.

The previous prime is 1213523449993. The next prime is 1213523450021. The reversal of 1213523450011 is 1100543253121.

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 1213523450011 - 2²³ = 1213515061403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213523450021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3049053696 + ... + 3049054093.

It is an arithmetic number, because the mean of its divisors is an integer number (304905389500).

Almost surely, 2^{1213523450011} is an apocalyptic number.

1213523450011 is a deficient number, since it is larger than the sum of its proper divisors (6098107989).

1213523450011 is an equidigital number, since it uses as much as digits as its factorization.

1213523450011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6098107988.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 1213523450011 in words is "one trillion, two hundred thirteen billion, five hundred twenty-three million, four hundred fifty thousand, eleven".