1020421204242 has 64 divisors (see below), whose sum is σ = 2301892560000. Its totient is φ = 298841978880.

The previous prime is 1020421204241. The next prime is 1020421204247. The reversal of 1020421204242 is 2424021240201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1020421204241) 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 31 ways as a sum of consecutive naturals, for example, 1038367 + ... + 1766082.

It is an arithmetic number, because the mean of its divisors is an integer number (35967071250).

Almost surely, 2^{1020421204242} is an apocalyptic number.

1020421204242 is an abundant number, since it is smaller than the sum of its proper divisors (1281471355758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020421204242 is a wasteful number, since it uses less digits than its factorization.

1020421204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804651.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 1020421204242 its reverse (2424021240201), we get a palindrome (3444442444443).

The spelling of 1020421204242 in words is "one trillion, twenty billion, four hundred twenty-one million, two hundred four thousand, two hundred forty-two".