1222120011222 has 36 divisors (see below), whose sum is σ = 2910530996100. Its totient is φ = 370339396680.

The previous prime is 1222120011193. The next prime is 1222120011223. The reversal of 1222120011222 is 2221100212221.

It is a happy number.

1222120011222 is a `hidden beast` number, since 12 + 221 + 200 + 11 + 222 = 666.

It is a super-2 number, since 2×1222120011222² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1222120011195 and 1222120011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120011223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 280557972 + ... + 280562327.

It is an arithmetic number, because the mean of its divisors is an integer number (80848083225).

Almost surely, 2^{1222120011222} is an apocalyptic number.

1222120011222 is an abundant number, since it is smaller than the sum of its proper divisors (1688410984878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222120011222 is a wasteful number, since it uses less digits than its factorization.

1222120011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561120329 (or 561120315 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222120011222 its reverse (2221100212221), we get a palindrome (3443220223443).

The spelling of 1222120011222 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, eleven thousand, two hundred twenty-two".