1012221321200 has 60 divisors (see below), whose sum is σ = 2434713496488. Its totient is φ = 404413728000.

The previous prime is 1012221321197. The next prime is 1012221321227. The reversal of 1012221321200 is 21231222101.

It is a congruent number.

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, 1142126 + ... + 1824525.

Almost surely, 2^{1012221321200} is an apocalyptic number.

1012221321200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012221321200 is an abundant number, since it is smaller than the sum of its proper divisors (1422492175288).

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

1012221321200 is a wasteful number, since it uses less digits than its factorization.

1012221321200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967522 (or 2967511 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1012221321200 its reverse (21231222101), we get a palindrome (1033452543301).

Subtracting from 1012221321200 its reverse (21231222101), we obtain a palindrome (990990099099).

The spelling of 1012221321200 in words is "one trillion, twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred".