1021020200000 has 84 divisors (see below), whose sum is σ = 2532447108324. Its totient is φ = 408408000000.

The previous prime is 1021020199967. The next prime is 1021020200023. The reversal of 1021020200000 is 20201201.

It can be written as a sum of positive squares in 6 ways, for example, as 805010906176 + 216009293824 = 897224^2 + 464768^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2352551 + ... + 2752550.

It is an arithmetic number, because the mean of its divisors is an integer number (30148179861).

Almost surely, 2^{1021020200000} is an apocalyptic number.

1021020200000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021020200000 is an abundant number, since it is smaller than the sum of its proper divisors (1511426908324).

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

1021020200000 is an frugal number, since it uses more digits than its factorization.

1021020200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105138 (or 5105108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 1021020200000 its reverse (20201201), we get a palindrome (1021040401201).

The spelling of 1021020200000 in words is "one trillion, twenty-one billion, twenty million, two hundred thousand".