1222221011211 has 48 divisors (see below), whose sum is σ = 1830716900064. Its totient is φ = 785113731072.

The previous prime is 1222221011191. The next prime is 1222221011213. The reversal of 1222221011211 is 1121101222221.

1222221011211 is a `hidden beast` number, since 1 + 222 + 221 + 0 + 11 + 211 = 666.

It is not a de Polignac number, because 1222221011211 - 2¹³ = 1222221003019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222221011213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192867435 + ... + 192873771.

It is an arithmetic number, because the mean of its divisors is an integer number (38139935418).

Almost surely, 2^{1222221011211} is an apocalyptic number.

1222221011211 is a deficient number, since it is larger than the sum of its proper divisors (608495888853).

1222221011211 is a wasteful number, since it uses less digits than its factorization.

1222221011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900 (or 11897 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222221011211 its reverse (1121101222221), we get a palindrome (2343322233432).

The spelling of 1222221011211 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, eleven thousand, two hundred eleven".