1211201122201 has 16 divisors (see below), whose sum is σ = 1418701910400. Its totient is φ = 1033598877360.

The previous prime is 1211201122193. The next prime is 1211201122217. The reversal of 1211201122201 is 1022211021121.

It is not a de Polignac number, because 1211201122201 - 2³ = 1211201122193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211201122301) 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 in 15 ways as a sum of consecutive naturals, for example, 7700110 + ... + 7855831.

It is an arithmetic number, because the mean of its divisors is an integer number (88668869400).

Almost surely, 2^{1211201122201} is an apocalyptic number.

It is an amenable number.

1211201122201 is a deficient number, since it is larger than the sum of its proper divisors (207500788199).

1211201122201 is an equidigital number, since it uses as much as digits as its factorization.

1211201122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556189 (or 15556175 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211201122201 its reverse (1022211021121), we get a palindrome (2233412143322).

The spelling of 1211201122201 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred twenty-two thousand, two hundred one".