1001200003020 has 72 divisors (see below), whose sum is σ = 3470826681504. Its totient is φ = 228845714688.

The previous prime is 1001200002997. The next prime is 1001200003039. The reversal of 1001200003020 is 203000021001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1001200002993 and 1001200003011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 397300329 + ... + 397302848.

It is an arithmetic number, because the mean of its divisors is an integer number (48205926132).

Almost surely, 2^{1001200003020} is an apocalyptic number.

1001200003020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001200003020 is an abundant number, since it is smaller than the sum of its proper divisors (2469626678484).

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

1001200003020 is a wasteful number, since it uses less digits than its factorization.

1001200003020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794603199 (or 794603194 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 1001200003020 its reverse (203000021001), we get a palindrome (1204200024021).

The spelling of 1001200003020 in words is "one trillion, one billion, two hundred million, three thousand, twenty".