1221200000201 has 8 divisors (see below), whose sum is σ = 1229151834144.
Its totient is φ = 1213273776960.
The previous prime is 1221200000197. The next prime is 1221200000203. The reversal of 1221200000201 is 1020000021221.
Adding to 1221200000201 its reverse (1020000021221), we get a palindrome (2241200021422).
It is a happy number.
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 1221200000201 - 22 = 1221200000197 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1221200000203) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6306995 + ... + 6497736.
It is an arithmetic number, because the mean of its divisors is an integer number (153643979268).
Almost surely, 21221200000201 is an apocalyptic number.
It is an amenable number.
1221200000201 is a deficient number, since it is larger than the sum of its proper divisors (7951833943).
1221200000201 is a wasteful number, since it uses less digits than its factorization.
1221200000201 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 12805351.
The product of its (nonzero) digits is 16, while the sum is 11.
The spelling of 1221200000201 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred one", and thus it is an aban number.