1212212222201 has 16 divisors (see below), whose sum is σ = 1286566127616. Its totient is φ = 1140272640000.

The previous prime is 1212212222191. The next prime is 1212212222231. The reversal of 1212212222201 is 1022222122121.

It is a cyclic number.

It is not a de Polignac number, because 1212212222201 - 2¹⁰ = 1212212221177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212212222231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1415240 + ... + 2104121.

It is an arithmetic number, because the mean of its divisors is an integer number (80410382976).

Almost surely, 2^{1212212222201} is an apocalyptic number.

It is an amenable number.

1212212222201 is a deficient number, since it is larger than the sum of its proper divisors (74353905415).

1212212222201 is a wasteful number, since it uses less digits than its factorization.

1212212222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519704.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1212212222201 its reverse (1022222122121), we get a palindrome (2234434344322).

The spelling of 1212212222201 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, two hundred one".