1220211220201 has 2 divisors, whose sum is σ = 1220211220202. Its totient is φ = 1220211220200.

The previous prime is 1220211220187. The next prime is 1220211220213. The reversal of 1220211220201 is 1020221120221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019776825600 + 200434394601 = 1009840^2 + 447699^2 .

It is an emirp because it is prime and its reverse (1020221120221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220211220201 - 2⁵ = 1220211220169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220211290201) 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 as a sum of consecutive naturals, namely, 610105610100 + 610105610101.

It is an arithmetic number, because the mean of its divisors is an integer number (610105610101).

Almost surely, 2^{1220211220201} is an apocalyptic number.

It is an amenable number.

1220211220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220211220201 is an equidigital number, since it uses as much as digits as its factorization.

1220211220201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220211220201 its reverse (1020221120221), we get a palindrome (2240432340422).

The spelling of 1220211220201 in words is "one trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred one".