1021003020200 has 24 divisors (see below), whose sum is σ = 2373832022430. Its totient is φ = 408401208000.

The previous prime is 1021003020199. The next prime is 1021003020211. The reversal of 1021003020200 is 20203001201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 931414149604 + 89588870596 = 965098^2 + 299314^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2552507351 + ... + 2552507750.

Almost surely, 2^{1021003020200} is an apocalyptic number.

1021003020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021003020200 is an abundant number, since it is smaller than the sum of its proper divisors (1352829002230).

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

1021003020200 is a wasteful number, since it uses less digits than its factorization.

1021003020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5105015117 (or 5105015108 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 1021003020200 its reverse (20203001201), we get a palindrome (1041206021401).

The spelling of 1021003020200 in words is "one trillion, twenty-one billion, three million, twenty thousand, two hundred".