1021000221003 has 32 divisors (see below), whose sum is σ = 1639549849600. Its totient is φ = 552095774496.

The previous prime is 1021000220957. The next prime is 1021000221029. The reversal of 1021000221003 is 3001220001201.

1021000221003 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021000221003 - 2¹⁶ = 1021000155467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021000221003.

It is not an unprimeable number, because it can be changed into a prime (1021000221203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1096663 + ... + 1801296.

It is an arithmetic number, because the mean of its divisors is an integer number (51235932800).

Almost surely, 2^{1021000221003} is an apocalyptic number.

1021000221003 is a deficient number, since it is larger than the sum of its proper divisors (618549628597).

1021000221003 is a wasteful number, since it uses less digits than its factorization.

1021000221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898871.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1021000221003 its reverse (3001220001201), we get a palindrome (4022220222204).

The spelling of 1021000221003 in words is "one trillion, twenty-one billion, two hundred twenty-one thousand, three".