1221200001202 has 8 divisors (see below), whose sum is σ = 1839400832412.
Its totient is φ = 608066390400.
The previous prime is 1221200001191. The next prime is 1221200001209. The reversal of 1221200001202 is 2021000021221.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 1152314224681 + 68885776521 = 1073459^2 + 262461^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is not an unprimeable number, because it can be changed into a prime (1221200001209) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266804499 + ... + 1266805462.
Almost surely, 21221200001202 is an apocalyptic number.
1221200001202 is a deficient number, since it is larger than the sum of its proper divisors (618200831210).
1221200001202 is a wasteful number, since it uses less digits than its factorization.
1221200001202 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2533610204.
The product of its (nonzero) digits is 32, while the sum is 13.
Adding to 1221200001202 its reverse (2021000021221), we get a palindrome (3242200022423).
The spelling of 1221200001202 in words is "one trillion, two hundred twenty-one billion, two hundred million, one thousand, two hundred two".