1222121012201 has 4 divisors (see below), whose sum is σ = 1264263116100. Its totient is φ = 1179978908304.

The previous prime is 1222121012197. The next prime is 1222121012269. The reversal of 1222121012201 is 1022101212221.

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 350280504025 + 871840508176 = 591845^2 + 933724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222121012201 - 2² = 1222121012197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222121012201.

It is not an unprimeable number, because it can be changed into a prime (1222121012501) 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, 21071051906 + ... + 21071051963.

It is an arithmetic number, because the mean of its divisors is an integer number (316065779025).

Almost surely, 2^{1222121012201} is an apocalyptic number.

It is an amenable number.

1222121012201 is a deficient number, since it is larger than the sum of its proper divisors (42142103899).

1222121012201 is an equidigital number, since it uses as much as digits as its factorization.

1222121012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42142103898.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222121012201 its reverse (1022101212221), we get a palindrome (2244222224422).

The spelling of 1222121012201 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, twelve thousand, two hundred one".