1023120311543 has 8 divisors (see below), whose sum is σ = 1131851408256. Its totient is φ = 917009241400.

The previous prime is 1023120311533. The next prime is 1023120311573. The reversal of 1023120311543 is 3451130213201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1023120311543 - 2²⁸ = 1022851876087 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 (1023120311533) 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 7 ways as a sum of consecutive naturals, for example, 655005821 + ... + 655007382.

It is an arithmetic number, because the mean of its divisors is an integer number (141481426032).

Almost surely, 2^{1023120311543} is an apocalyptic number.

1023120311543 is a deficient number, since it is larger than the sum of its proper divisors (108731096713).

1023120311543 is a wasteful number, since it uses less digits than its factorization.

1023120311543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310013285.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 1023120311543 its reverse (3451130213201), we get a palindrome (4474250524744).

The spelling of 1023120311543 in words is "one trillion, twenty-three billion, one hundred twenty million, three hundred eleven thousand, five hundred forty-three".