1212201211101 has 16 divisors (see below), whose sum is σ = 1643702392320. Its totient is φ = 794417747760.

The previous prime is 1212201211087. The next prime is 1212201211153. The reversal of 1212201211101 is 1011121022121.

It is a happy number.

It is not a de Polignac number, because 1212201211101 - 2²¹ = 1212199113949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212201211181) 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, 14281056 + ... + 14365686.

It is an arithmetic number, because the mean of its divisors is an integer number (102731399520).

Almost surely, 2^{1212201211101} is an apocalyptic number.

It is an amenable number.

1212201211101 is a deficient number, since it is larger than the sum of its proper divisors (431501181219).

1212201211101 is an equidigital number, since it uses as much as digits as its factorization.

1212201211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165616.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212201211101 its reverse (1011121022121), we get a palindrome (2223322233222).

The spelling of 1212201211101 in words is "one trillion, two hundred twelve billion, two hundred one million, two hundred eleven thousand, one hundred one".