1020221000203 has 4 divisors (see below), whose sum is σ = 1021837832848. Its totient is φ = 1018604167560.

The previous prime is 1020221000143. The next prime is 1020221000207. The reversal of 1020221000203 is 3020001220201.

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 1020221000203 - 2²⁹ = 1019684129291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020221000207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808415376 + ... + 808416637.

It is an arithmetic number, because the mean of its divisors is an integer number (255459458212).

Almost surely, 2^{1020221000203} is an apocalyptic number.

1020221000203 is a deficient number, since it is larger than the sum of its proper divisors (1616832645).

1020221000203 is an equidigital number, since it uses as much as digits as its factorization.

1020221000203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616832644.

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

Adding to 1020221000203 its reverse (3020001220201), we get a palindrome (4040222220404).

The spelling of 1020221000203 in words is "one trillion, twenty billion, two hundred twenty-one million, two hundred three", and thus it is an aban number.