22121212002 has 16 divisors (see below), whose sum is σ = 44243902560. Its totient is φ = 7373490912.

The previous prime is 22121211997. The next prime is 22121212007. The reversal of 22121212002 is 20021212122.

It is an interprime number because it is at equal distance from previous prime (22121211997) and next prime (22121212007).

It is not an unprimeable number, because it can be changed into a prime (22121212007) 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, 271149 + ... + 343167.

It is an arithmetic number, because the mean of its divisors is an integer number (2765243910).

Almost surely, 2^22121212002 is an apocalyptic number.

22121212002 is an abundant number, since it is smaller than the sum of its proper divisors (22122690558).

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

22121212002 is a wasteful number, since it uses less digits than its factorization.

22121212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123217.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22121212002 its reverse (20021212122), we get a palindrome (42142424124).

The spelling of 22121212002 in words is "twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, two".