1003221351020 has 48 divisors (see below), whose sum is σ = 2407833933120. Its totient is φ = 343946936064.

The previous prime is 1003221351017. The next prime is 1003221351023. The reversal of 1003221351020 is 201531223001.

It is an interprime number because it is at equal distance from previous prime (1003221351017) and next prime (1003221351023).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1003221350983 and 1003221351001.

It is not an unprimeable number, because it can be changed into a prime (1003221351023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3442442 + ... + 3722478.

It is an arithmetic number, because the mean of its divisors is an integer number (50163206940).

Almost surely, 2^{1003221351020} is an apocalyptic number.

1003221351020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003221351020 is an abundant number, since it is smaller than the sum of its proper divisors (1404612582100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1003221351020 is a wasteful number, since it uses less digits than its factorization.

1003221351020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305642 (or 305640 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 1003221351020 its reverse (201531223001), we get a palindrome (1204752574021).

The spelling of 1003221351020 in words is "one trillion, three billion, two hundred twenty-one million, three hundred fifty-one thousand, twenty".