22232112012 has 48 divisors (see below), whose sum is σ = 62878704000. Its totient is φ = 6737003280.

The previous prime is 22232111999. The next prime is 22232112017. The reversal of 22232112012 is 21021123222.

22232112012 is a `hidden beast` number, since 222 + 321 + 120 + 1 + 2 = 666.

It is a super-2 number, since 2×22232112012² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (22232112017) 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, 9355762 + ... + 9358137.

It is an arithmetic number, because the mean of its divisors is an integer number (1309973000).

Almost surely, 2^22232112012 is an apocalyptic number.

22232112012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22232112012 is an abundant number, since it is smaller than the sum of its proper divisors (40646591988).

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

22232112012 is a wasteful number, since it uses less digits than its factorization.

22232112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18713923 (or 18713915 counting only the distinct ones).

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

Adding to 22232112012 its reverse (21021123222), we get a palindrome (43253235234).

The spelling of 22232112012 in words is "twenty-two billion, two hundred thirty-two million, one hundred twelve thousand, twelve".