1213056241543 has 4 divisors (see below), whose sum is σ = 1213058824488. Its totient is φ = 1213053658600.

The previous prime is 1213056241541. The next prime is 1213056241561. The reversal of 1213056241543 is 3451426503121.

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 1213056241543 - 2¹ = 1213056241541 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 (1213056241541) 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, 365896 + ... + 1599997.

It is an arithmetic number, because the mean of its divisors is an integer number (303264706122).

Almost surely, 2^{1213056241543} is an apocalyptic number.

1213056241543 is a deficient number, since it is larger than the sum of its proper divisors (2582945).

1213056241543 is an equidigital number, since it uses as much as digits as its factorization.

1213056241543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582944.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 1213056241543 in words is "one trillion, two hundred thirteen billion, fifty-six million, two hundred forty-one thousand, five hundred forty-three".