1221220010200 has 48 divisors (see below), whose sum is σ = 2841231375000. Its totient is φ = 488162008320.

The previous prime is 1221220010183. The next prime is 1221220010221. The reversal of 1221220010200 is 20100221221.

It is a happy number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1736925 + ... + 2336524.

Almost surely, 2^{1221220010200} is an apocalyptic number.

1221220010200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221220010200 is an abundant number, since it is smaller than the sum of its proper divisors (1620011364800).

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

1221220010200 is a wasteful number, since it uses less digits than its factorization.

1221220010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074964 (or 4074955 counting only the distinct ones).

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

Adding to 1221220010200 its reverse (20100221221), we get a palindrome (1241320231421).

The spelling of 1221220010200 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, ten thousand, two hundred".