1201220100200 has 24 divisors (see below), whose sum is σ = 2792836733430. Its totient is φ = 480488040000.

The previous prime is 1201220100169. The next prime is 1201220100319. The reversal of 1201220100200 is 20010221021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 803364445636 + 397855654564 = 896306^2 + 630758^2 .

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, 3003050051 + ... + 3003050450.

Almost surely, 2^{1201220100200} is an apocalyptic number.

1201220100200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201220100200 is an abundant number, since it is smaller than the sum of its proper divisors (1591616633230).

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

1201220100200 is a wasteful number, since it uses less digits than its factorization.

1201220100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006100517 (or 6006100508 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1201220100200 its reverse (20010221021), we get a palindrome (1221230321221).

The spelling of 1201220100200 in words is "one trillion, two hundred one billion, two hundred twenty million, one hundred thousand, two hundred".