21220010220012 has 12 divisors (see below), whose sum is σ = 49513357180056. Its totient is φ = 7073336740000.

The previous prime is 21220010220007. The next prime is 21220010220037. The reversal of 21220010220012 is 21002201002212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21220010219973 and 21220010220000.

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, 884167092489 + ... + 884167092512.

It is an arithmetic number, because the mean of its divisors is an integer number (4126113098338).

Almost surely, 2^{21220010220012} is an apocalyptic number.

It is an amenable number.

21220010220012 is an abundant number, since it is smaller than the sum of its proper divisors (28293346960044).

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

21220010220012 is a wasteful number, since it uses less digits than its factorization.

21220010220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768334185008 (or 1768334185006 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220010220012 its reverse (21002201002212), we get a palindrome (42222211222224).

The spelling of 21220010220012 in words is "twenty-one trillion, two hundred twenty billion, ten million, two hundred twenty thousand, twelve".