22022212122 has 80 divisors (see below), whose sum is σ = 49740467040. Its totient is φ = 7282281888.

The previous prime is 22022212117. The next prime is 22022212127. The reversal of 22022212122 is 22121222022.

It is an interprime number because it is at equal distance from previous prime (22022212117) and next prime (22022212127).

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 = 22022212095 and 22022212104.

It is not an unprimeable number, because it can be changed into a prime (22022212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18935113 + ... + 18936275.

It is an arithmetic number, because the mean of its divisors is an integer number (621755838).

Almost surely, 2^22022212122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22022212122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24870233520).

22022212122 is an abundant number, since it is smaller than the sum of its proper divisors (27718254918).

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

22022212122 is a wasteful number, since it uses less digits than its factorization.

22022212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009 (or 2000 counting only the distinct ones).

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

Adding to 22022212122 its reverse (22121222022), we get a palindrome (44143434144).

The spelling of 22022212122 in words is "twenty-two billion, twenty-two million, two hundred twelve thousand, one hundred twenty-two".