1221201322201 has 16 divisors (see below), whose sum is σ = 1397638015488. Its totient is φ = 1045260216000.

The previous prime is 1221201322189. The next prime is 1221201322213. The reversal of 1221201322201 is 1022231021221.

It is an interprime number because it is at equal distance from previous prime (1221201322189) and next prime (1221201322213).

It is not a de Polignac number, because 1221201322201 - 2⁵ = 1221201322169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221201322501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21021471 + ... + 21079483.

It is an arithmetic number, because the mean of its divisors is an integer number (87352375968).

Almost surely, 2^{1221201322201} is an apocalyptic number.

It is an amenable number.

1221201322201 is a deficient number, since it is larger than the sum of its proper divisors (176436693287).

1221201322201 is an equidigital number, since it uses as much as digits as its factorization.

1221201322201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62232.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1221201322201 its reverse (1022231021221), we get a palindrome (2243432343422).

The spelling of 1221201322201 in words is "one trillion, two hundred twenty-one billion, two hundred one million, three hundred twenty-two thousand, two hundred one".