22002222012 has 12 divisors (see below), whose sum is σ = 51338518056. Its totient is φ = 7334074000.

The previous prime is 22002221999. The next prime is 22002222017. The reversal of 22002222012 is 21022220022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 22002221982 and 22002222000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002222017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916759239 + ... + 916759262.

It is an arithmetic number, because the mean of its divisors is an integer number (4278209838).

Almost surely, 2^22002222012 is an apocalyptic number.

It is an amenable number.

22002222012 is an abundant number, since it is smaller than the sum of its proper divisors (29336296044).

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

22002222012 is a wasteful number, since it uses less digits than its factorization.

22002222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833518508 (or 1833518506 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22002222012 its reverse (21022220022), we get a palindrome (43024442034).

The spelling of 22002222012 in words is "twenty-two billion, two million, two hundred twenty-two thousand, twelve".