1221200000211 has 8 divisors (see below), whose sum is σ = 1644388119504.
Its totient is φ = 806072607200.
The previous prime is 1221200000203. The next prime is 1221200000249. The reversal of 1221200000211 is 1120000021221.
Adding to 1221200000211 its reverse (1120000021221), we get a palindrome (2341200021432).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 1221200000211 - 23 = 1221200000203 is a prime.
It is not an unprimeable number, because it can be changed into a prime (1221200000011) by changing a digit.
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 7 ways as a sum of consecutive naturals, for example, 2015181216 + ... + 2015181821.
It is an arithmetic number, because the mean of its divisors is an integer number (205548514938).
Almost surely, 21221200000211 is an apocalyptic number.
1221200000211 is a deficient number, since it is larger than the sum of its proper divisors (423188119293).
1221200000211 is a wasteful number, since it uses less digits than its factorization.
1221200000211 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4030363141.
The product of its (nonzero) digits is 16, while the sum is 12.
The spelling of 1221200000211 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred eleven", and thus it is an aban number.