1020242554021 has 4 divisors (see below), whose sum is σ = 1020277234912. Its totient is φ = 1020207873132.

The previous prime is 1020242554007. The next prime is 1020242554033. The reversal of 1020242554021 is 1204552420201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020242554021 - 2⁹ = 1020242553509 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 (1020242554421) 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, 17296281 + ... + 17355166.

It is an arithmetic number, because the mean of its divisors is an integer number (255069308728).

Almost surely, 2^{1020242554021} is an apocalyptic number.

It is an amenable number.

1020242554021 is a deficient number, since it is larger than the sum of its proper divisors (34680891).

1020242554021 is an equidigital number, since it uses as much as digits as its factorization.

1020242554021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34680890.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 1020242554021 its reverse (1204552420201), we get a palindrome (2224794974222).

The spelling of 1020242554021 in words is "one trillion, twenty billion, two hundred forty-two million, five hundred fifty-four thousand, twenty-one".