1020020030221 has 4 divisors (see below), whose sum is σ = 1020024848700. Its totient is φ = 1020015211744.

The previous prime is 1020020030213. The next prime is 1020020030257. The reversal of 1020020030221 is 1220300200201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426833555625 + 593186474596 = 653325^2 + 770186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020020030221 - 2³ = 1020020030213 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 (1020020030921) 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, 2076376 + ... + 2520193.

It is an arithmetic number, because the mean of its divisors is an integer number (255006212175).

Almost surely, 2^{1020020030221} is an apocalyptic number.

It is an amenable number.

1020020030221 is a deficient number, since it is larger than the sum of its proper divisors (4818479).

1020020030221 is an equidigital number, since it uses as much as digits as its factorization.

1020020030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818478.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 1020020030221 its reverse (1220300200201), we get a palindrome (2240320230422).

The spelling of 1020020030221 in words is "one trillion, twenty billion, twenty million, thirty thousand, two hundred twenty-one".