1212203223200 has 36 divisors (see below), whose sum is σ = 2959291120590. Its totient is φ = 484881288960.

The previous prime is 1212203223173. The next prime is 1212203223239. The reversal of 1212203223200 is 23223022121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 931943098384 + 280260124816 = 965372^2 + 529396^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 5 ways as a sum of consecutive naturals, for example, 757626215 + ... + 757627814.

Almost surely, 2^{1212203223200} is an apocalyptic number.

1212203223200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212203223200 is an abundant number, since it is smaller than the sum of its proper divisors (1747087897390).

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

1212203223200 is a wasteful number, since it uses less digits than its factorization.

1212203223200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515254049 (or 1515254036 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1212203223200 its reverse (23223022121), we get a palindrome (1235426245321).

The spelling of 1212203223200 in words is "one trillion, two hundred twelve billion, two hundred three million, two hundred twenty-three thousand, two hundred".