1221120201200 has 60 divisors (see below), whose sum is σ = 2938952733528. Its totient is φ = 487580409600.

The previous prime is 1221120201199. The next prime is 1221120201227. The reversal of 1221120201200 is 21020211221.

It is a super-2 number, since 2×1221120201200² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2485991 + ... + 2936390.

Almost surely, 2^{1221120201200} is an apocalyptic number.

1221120201200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221120201200 is an abundant number, since it is smaller than the sum of its proper divisors (1717832532328).

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

1221120201200 is a wasteful number, since it uses less digits than its factorization.

1221120201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5422962 (or 5422951 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221120201200 its reverse (21020211221), we get a palindrome (1242140412421).

The spelling of 1221120201200 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred one thousand, two hundred".