1121222222211 has 192 divisors, whose sum is σ = 1991116455936. Its totient is φ = 548422617600.

The previous prime is 1121222222209. The next prime is 1121222222213. The reversal of 1121222222211 is 1122222221211.

It is an interprime number because it is at equal distance from previous prime (1121222222209) and next prime (1121222222213).

It is not a de Polignac number, because 1121222222211 - 2¹ = 1121222222209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1121222222213) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 272735046 + ... + 272739156.

It is an arithmetic number, because the mean of its divisors is an integer number (10370398208).

Almost surely, 2^{1121222222211} is an apocalyptic number.

1121222222211 is a deficient number, since it is larger than the sum of its proper divisors (869894233725).

1121222222211 is a wasteful number, since it uses less digits than its factorization.

1121222222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282 (or 4269 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 1121222222211 its reverse (1122222221211), we get a palindrome (2243444443422).

The spelling of 1121222222211 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".