22111200012 has 48 divisors (see below), whose sum is σ = 56291760000. Its totient is φ = 6699327360.

The previous prime is 22111199989. The next prime is 22111200019. The reversal of 22111200012 is 21000211122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22111200019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1631239 + ... + 1644737.

It is an arithmetic number, because the mean of its divisors is an integer number (1172745000).

Almost surely, 2^22111200012 is an apocalyptic number.

22111200012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22111200012 is an abundant number, since it is smaller than the sum of its proper divisors (34180559988).

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

22111200012 is a wasteful number, since it uses less digits than its factorization.

22111200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25926 (or 25924 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22111200012 its reverse (21000211122), we get a palindrome (43111411134).

The spelling of 22111200012 in words is "twenty-two billion, one hundred eleven million, two hundred thousand, twelve".