1212122020201 has 4 divisors (see below), whose sum is σ = 1212140742100. Its totient is φ = 1212103298304.

The previous prime is 1212122020183. The next prime is 1212122020211. The reversal of 1212122020201 is 1020202212121.

It is a happy number.

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 752877259225 + 459244760976 = 867685^2 + 677676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212122020201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212122020211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9263496 + ... + 9393433.

It is an arithmetic number, because the mean of its divisors is an integer number (303035185525).

Almost surely, 2^{1212122020201} is an apocalyptic number.

It is an amenable number.

1212122020201 is a deficient number, since it is larger than the sum of its proper divisors (18721899).

1212122020201 is an equidigital number, since it uses as much as digits as its factorization.

1212122020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18721898.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212122020201 its reverse (1020202212121), we get a palindrome (2232324232322).

The spelling of 1212122020201 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, twenty thousand, two hundred one".