1321201222200 has 240 divisors, whose sum is σ = 4788238823280. Its totient is φ = 337001955840.

The previous prime is 1321201222171. The next prime is 1321201222219. The reversal of 1321201222200 is 22221021231.

1321201222200 is a `hidden beast` number, since 1 + 321 + 2 + 0 + 122 + 220 + 0 = 666.

It is a super-3 number, since 3×1321201222200³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1400349 + ... + 2145548.

It is an arithmetic number, because the mean of its divisors is an integer number (19950995097).

Almost surely, 2^{1321201222200} is an apocalyptic number.

1321201222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321201222200 is an abundant number, since it is smaller than the sum of its proper divisors (3467037601080).

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

1321201222200 is a wasteful number, since it uses less digits than its factorization.

1321201222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545948 (or 3545930 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1321201222200 its reverse (22221021231), we get a palindrome (1343422243431).

The spelling of 1321201222200 in words is "one trillion, three hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, two hundred".