1021450105243 has 4 divisors (see below), whose sum is σ = 1065860979408. Its totient is φ = 977039231080.

The previous prime is 1021450105231. The next prime is 1021450105259. The reversal of 1021450105243 is 3425010541201.

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 1021450105243 - 2⁵ = 1021450105211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021450105343) 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, 22205437048 + ... + 22205437093.

It is an arithmetic number, because the mean of its divisors is an integer number (266465244852).

Almost surely, 2^{1021450105243} is an apocalyptic number.

1021450105243 is a deficient number, since it is larger than the sum of its proper divisors (44410874165).

1021450105243 is an equidigital number, since it uses as much as digits as its factorization.

1021450105243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44410874164.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1021450105243 its reverse (3425010541201), we get a palindrome (4446460646444).

The spelling of 1021450105243 in words is "one trillion, twenty-one billion, four hundred fifty million, one hundred five thousand, two hundred forty-three".