22211223012 has 36 divisors (see below), whose sum is σ = 61249131216. Its totient is φ = 6730673520.

The previous prime is 22211222977. The next prime is 22211223029. The reversal of 22211223012 is 21032211222.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28044078 + ... + 28044869.

It is an arithmetic number, because the mean of its divisors is an integer number (1701364756).

Almost surely, 2^22211223012 is an apocalyptic number.

22211223012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22211223012 is an abundant number, since it is smaller than the sum of its proper divisors (39037908204).

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

22211223012 is a wasteful number, since it uses less digits than its factorization.

22211223012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56088968 (or 56088963 counting only the distinct ones).

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

Adding to 22211223012 its reverse (21032211222), we get a palindrome (43243434234).

The spelling of 22211223012 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-three thousand, twelve".