2222121006 has 64 divisors (see below), whose sum is σ = 5714995200. Its totient is φ = 626846688.

The previous prime is 2222120987. The next prime is 2222121007. The reversal of 2222121006 is 6001212222.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2222121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222121007) 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 31 ways as a sum of consecutive naturals, for example, 7345 + ... + 67068.

It is an arithmetic number, because the mean of its divisors is an integer number (89296800).

Almost surely, 2^2222121006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2222121006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2857497600).

2222121006 is an abundant number, since it is smaller than the sum of its proper divisors (3492874194).

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

2222121006 is a wasteful number, since it uses less digits than its factorization.

2222121006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74510 (or 74504 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2222121006 is about 47139.3785067220. The cubic root of 2222121006 is about 1304.9360676832.

Adding to 2222121006 its reverse (6001212222), we get a palindrome (8223333228).

The spelling of 2222121006 in words is "two billion, two hundred twenty-two million, one hundred twenty-one thousand, six".