1222222122 has 80 divisors (see below), whose sum is σ = 3051430272. Its totient is φ = 362465280.

The previous prime is 1222222121. The next prime is 1222222171. The reversal of 1222222122 is 2212222221.

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

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 = 1222222095 and 1222222104.

It is not an unprimeable number, because it can be changed into a prime (1222222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 76458 + ... + 91050.

Almost surely, 2^1222222122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222222122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525715136).

1222222122 is an abundant number, since it is smaller than the sum of its proper divisors (1829208150).

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

1222222122 is a wasteful number, since it uses less digits than its factorization.

1222222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14665 (or 14656 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 1222222122 is about 34960.2935056329. The cubic root of 1222222122 is about 1069.1780807744.

Adding to 1222222122 its reverse (2212222221), we get a palindrome (3434444343).

Subtracting 1222222122 from its reverse (2212222221), we obtain a palindrome (990000099).

It can be divided in two parts, 12222221 and 22, that multiplied together give a palindrome (268888862).

The spelling of 1222222122 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-two".