1002221020028 has 6 divisors (see below), whose sum is σ = 1753886785056. Its totient is φ = 501110510012.

The previous prime is 1002221020027. The next prime is 1002221020039. The reversal of 1002221020028 is 8200201222001.

It is a happy number.

1002221020028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1002221019991 and 1002221020009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002221020027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125277627500 + ... + 125277627507.

It is an arithmetic number, because the mean of its divisors is an integer number (292314464176).

Almost surely, 2^{1002221020028} is an apocalyptic number.

It is an amenable number.

1002221020028 is a deficient number, since it is larger than the sum of its proper divisors (751665765028).

1002221020028 is a wasteful number, since it uses less digits than its factorization.

1002221020028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250555255011 (or 250555255009 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1002221020028 its reverse (8200201222001), we get a palindrome (9202422242029).

The spelling of 1002221020028 in words is "one trillion, two billion, two hundred twenty-one million, twenty thousand, twenty-eight".