1021304145543 has 8 divisors (see below), whose sum is σ = 1485533302656. Its totient is φ = 618972209400.

The previous prime is 1021304145517. The next prime is 1021304145623. The reversal of 1021304145543 is 3455414031201.

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

It is not a de Polignac number, because 1021304145543 - 2¹⁸ = 1021303883399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 30948610471 = 1021304145543 / (1 + 0 + 2 + 1 + 3 + 0 + 4 + 1 + 4 + 5 + 5 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021304145943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15474305203 + ... + 15474305268.

It is an arithmetic number, because the mean of its divisors is an integer number (185691662832).

Almost surely, 2^{1021304145543} is an apocalyptic number.

1021304145543 is a deficient number, since it is larger than the sum of its proper divisors (464229157113).

1021304145543 is a wasteful number, since it uses less digits than its factorization.

1021304145543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30948610485.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 1021304145543 its reverse (3455414031201), we get a palindrome (4476718176744).

The spelling of 1021304145543 in words is "one trillion, twenty-one billion, three hundred four million, one hundred forty-five thousand, five hundred forty-three".