1020200000221 has 4 divisors (see below), whose sum is σ = 1020288701632. Its totient is φ = 1020111298812.

The previous prime is 1020200000159. The next prime is 1020200000231. The reversal of 1020200000221 is 1220000020201.

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 1020200000221 - 2¹¹ = 1020199998173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020200000198 and 1020200000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020200000231) 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, 44333451 + ... + 44356456.

It is an arithmetic number, because the mean of its divisors is an integer number (255072175408).

Almost surely, 2^{1020200000221} is an apocalyptic number.

It is an amenable number.

1020200000221 is a deficient number, since it is larger than the sum of its proper divisors (88701411).

1020200000221 is an equidigital number, since it uses as much as digits as its factorization.

1020200000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88701410.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1020200000221 its reverse (1220000020201), we get a palindrome (2240200020422).

The spelling of 1020200000221 in words is "one trillion, twenty billion, two hundred million, two hundred twenty-one", and thus it is an aban number.