1021112533543 has 4 divisors (see below), whose sum is σ = 1022440378960. Its totient is φ = 1019784688128.

The previous prime is 1021112533531. The next prime is 1021112533559. The reversal of 1021112533543 is 3453352111201.

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 1021112533543 - 2⁹ = 1021112533031 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 (1021112533513) 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, 663921555 + ... + 663923092.

It is an arithmetic number, because the mean of its divisors is an integer number (255610094740).

Almost surely, 2^{1021112533543} is an apocalyptic number.

1021112533543 is a deficient number, since it is larger than the sum of its proper divisors (1327845417).

1021112533543 is an equidigital number, since it uses as much as digits as its factorization.

1021112533543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327845416.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 1021112533543 its reverse (3453352111201), we get a palindrome (4474464644744).

The spelling of 1021112533543 in words is "one trillion, twenty-one billion, one hundred twelve million, five hundred thirty-three thousand, five hundred forty-three".