21220200021012 has 24 divisors (see below), whose sum is σ = 50325501690912. Its totient is φ = 6957442629600.

The previous prime is 21220200020993. The next prime is 21220200021067. The reversal of 21220200021012 is 21012000202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220200020982 and 21220200021000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14494671414 + ... + 14494672877.

It is an arithmetic number, because the mean of its divisors is an integer number (2096895903788).

Almost surely, 2^{21220200021012} is an apocalyptic number.

It is an amenable number.

21220200021012 is an abundant number, since it is smaller than the sum of its proper divisors (29105301669900).

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

21220200021012 is a wasteful number, since it uses less digits than its factorization.

21220200021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28989344359 (or 28989344357 counting only the distinct ones).

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

Adding to 21220200021012 its reverse (21012000202212), we get a palindrome (42232200223224).

The spelling of 21220200021012 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, twenty-one thousand, twelve".