1222012221211 has 4 divisors (see below), whose sum is σ = 1222018407000. Its totient is φ = 1222006035424.

The previous prime is 1222012221103. The next prime is 1222012221233. The reversal of 1222012221211 is 1121222102221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222012221211 - 2²³ = 1222003832603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222012221251) 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, 2786446 + ... + 3195043.

It is an arithmetic number, because the mean of its divisors is an integer number (305504601750).

Almost surely, 2^{1222012221211} is an apocalyptic number.

1222012221211 is a deficient number, since it is larger than the sum of its proper divisors (6185789).

1222012221211 is an equidigital number, since it uses as much as digits as its factorization.

1222012221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185788.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222012221211 its reverse (1121222102221), we get a palindrome (2343234323432).

The spelling of 1222012221211 in words is "one trillion, two hundred twenty-two billion, twelve million, two hundred twenty-one thousand, two hundred eleven".