21220000000012 has 12 divisors (see below), whose sum is σ = 40510909091016. Its totient is φ = 9645454545440.

The previous prime is 21219999999953. The next prime is 21220000000093. The reversal of 21220000000012 is 21000000002212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241136363593 + ... + 241136363680.

It is an arithmetic number, because the mean of its divisors is an integer number (3375909090918).

Almost surely, 2^{21220000000012} is an apocalyptic number.

21220000000012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220000000012 is a deficient number, since it is larger than the sum of its proper divisors (19290909091004).

21220000000012 is a wasteful number, since it uses less digits than its factorization.

21220000000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482272727288 (or 482272727286 counting only the distinct ones).

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

Adding to 21220000000012 its reverse (21000000002212), we get a palindrome (42220000002224).

The spelling of 21220000000012 in words is "twenty-one trillion, two hundred twenty billion, twelve", and thus it is an aban number.