21220002112012 has 48 divisors (see below), whose sum is σ = 40919018311584. Its totient is φ = 9548320320000.

The previous prime is 21220002112007. The next prime is 21220002112021. The reversal of 21220002112012 is 21021120002212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25729198 + ... + 26541130.

It is an arithmetic number, because the mean of its divisors is an integer number (852479548158).

Almost surely, 2^{21220002112012} is an apocalyptic number.

21220002112012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220002112012 is a deficient number, since it is larger than the sum of its proper divisors (19699016199572).

21220002112012 is a wasteful number, since it uses less digits than its factorization.

21220002112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817930 (or 817928 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220002112012 its reverse (21021120002212), we get a palindrome (42241122114224).

The spelling of 21220002112012 in words is "twenty-one trillion, two hundred twenty billion, two million, one hundred twelve thousand, twelve".