1221330200201 has 8 divisors (see below), whose sum is σ = 1293217952040. Its totient is φ = 1149447426048.

The previous prime is 1221330200161. The next prime is 1221330200203. The reversal of 1221330200201 is 1020020331221.

It can be written as a sum of positive squares in 4 ways, for example, as 339889000000 + 881441200201 = 583000^2 + 938851^2 .

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 1221330200201 - 2⁶ = 1221330200137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221330200201.

It is not an unprimeable number, because it can be changed into a prime (1221330200203) 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, 733256 + ... + 1726361.

It is an arithmetic number, because the mean of its divisors is an integer number (161652244005).

Almost surely, 2^{1221330200201} is an apocalyptic number.

It is an amenable number.

1221330200201 is a deficient number, since it is larger than the sum of its proper divisors (71887751839).

1221330200201 is a wasteful number, since it uses less digits than its factorization.

1221330200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488843.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1221330200201 its reverse (1020020331221), we get a palindrome (2241350531422).

The spelling of 1221330200201 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, two hundred thousand, two hundred one".