22001223012 has 12 divisors (see below), whose sum is σ = 51336187056. Its totient is φ = 7333741000.

The previous prime is 22001222987. The next prime is 22001223029. The reversal of 22001223012 is 21032210022.

It is a happy number.

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 = 22001222982 and 22001223000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916717614 + ... + 916717637.

It is an arithmetic number, because the mean of its divisors is an integer number (4278015588).

Almost surely, 2^22001223012 is an apocalyptic number.

It is an amenable number.

22001223012 is an abundant number, since it is smaller than the sum of its proper divisors (29334964044).

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

22001223012 is a wasteful number, since it uses less digits than its factorization.

22001223012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833435258 (or 1833435256 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22001223012 its reverse (21032210022), we get a palindrome (43033433034).

The spelling of 22001223012 in words is "twenty-two billion, one million, two hundred twenty-three thousand, twelve".