22012012 has 24 divisors (see below), whose sum is σ = 43852032. Its totient is φ = 9570000.

The previous prime is 22011967. The next prime is 22012019. The reversal of 22012012 is 21021022.

It is a self number, because there is not a number n which added to its sum of digits gives 22012012.

It is not an unprimeable number, because it can be changed into a prime (22012019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9864 + ... + 11887.

It is an arithmetic number, because the mean of its divisors is an integer number (1827168).

Almost surely, 2^22012012 is an apocalyptic number.

22012012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22012012 is a deficient number, since it is larger than the sum of its proper divisors (21840020).

22012012 is a wasteful number, since it uses less digits than its factorization.

22012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21789 (or 21787 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22012012 is about 4691.6960685876. The cubic root of 22012012 is about 280.2549209027.

Adding to 22012012 its reverse (21021022), we get a palindrome (43033034).

The spelling of 22012012 in words is "twenty-two million, twelve thousand, twelve".