1321201222201 has 32 divisors (see below), whose sum is σ = 1636708550400. Its totient is φ = 1062369762048.

The previous prime is 1321201222171. The next prime is 1321201222219. The reversal of 1321201222201 is 1022221021231.

It is not a de Polignac number, because 1321201222201 - 2⁹ = 1321201221689 is a prime.

It is a super-3 number, since 3×1321201222201³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321201220201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1421091 + ... + 2159143.

It is an arithmetic number, because the mean of its divisors is an integer number (51147142200).

Almost surely, 2^{1321201222201} is an apocalyptic number.

It is an amenable number.

1321201222201 is a deficient number, since it is larger than the sum of its proper divisors (315507328199).

1321201222201 is an equidigital number, since it uses as much as digits as its factorization.

1321201222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738398 (or 738384 counting only the distinct ones).

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

Adding to 1321201222201 its reverse (1022221021231), we get a palindrome (2343422243432).

The spelling of 1321201222201 in words is "one trillion, three hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, two hundred one".