1111212212222 has 16 divisors (see below), whose sum is σ = 1945465758720. Its totient is φ = 466101170808.

The previous prime is 1111212212221. The next prime is 1111212212237. The reversal of 1111212212222 is 2222122121111.

It is a super-2 number, since 2×1111212212222² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1111212212194 and 1111212212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844385522 + ... + 844386837.

It is an arithmetic number, because the mean of its divisors is an integer number (121591609920).

Almost surely, 2^{1111212212222} is an apocalyptic number.

1111212212222 is a deficient number, since it is larger than the sum of its proper divisors (834253546498).

1111212212222 is a wasteful number, since it uses less digits than its factorization.

1111212212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688772415.

The product of its digits is 128, while the sum is 20.

Adding to 1111212212222 its reverse (2222122121111), we get a palindrome (3333334333333).

The spelling of 1111212212222 in words is "one trillion, one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-two".