1012221020200 has 192 divisors, whose sum is σ = 2559035430000. Its totient is φ = 370130288640.

The previous prime is 1012221020189. The next prime is 1012221020233. The reversal of 1012221020200 is 20201222101.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 9823584996 + 1002397435204 = 99114^2 + 1001198^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159930636 + ... + 159936964.

Almost surely, 2^{1012221020200} is an apocalyptic number.

1012221020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012221020200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279517715000).

1012221020200 is an abundant number, since it is smaller than the sum of its proper divisors (1546814409800).

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

1012221020200 is a wasteful number, since it uses less digits than its factorization.

1012221020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1012221020200 its reverse (20201222101), we get a palindrome (1032422242301).

The spelling of 1012221020200 in words is "one trillion, twelve billion, two hundred twenty-one million, twenty thousand, two hundred".