1212011212201 has 4 divisors (see below), whose sum is σ = 1212033464404. Its totient is φ = 1211988960000.

The previous prime is 1212011212121. The next prime is 1212011212211. The reversal of 1212011212201 is 1022121102121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168181189801 + 1043830022400 = 410099^2 + 1021680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212011212201 - 2²¹ = 1212009115049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212011212211) 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 3 ways as a sum of consecutive naturals, for example, 11044200 + ... + 11153401.

It is an arithmetic number, because the mean of its divisors is an integer number (303008366101).

Almost surely, 2^{1212011212201} is an apocalyptic number.

It is an amenable number.

1212011212201 is a deficient number, since it is larger than the sum of its proper divisors (22252203).

1212011212201 is an equidigital number, since it uses as much as digits as its factorization.

1212011212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22252202.

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

Adding to 1212011212201 its reverse (1022121102121), we get a palindrome (2234132314322).

The spelling of 1212011212201 in words is "one trillion, two hundred twelve billion, eleven million, two hundred twelve thousand, two hundred one".