21202120000012 has 24 divisors (see below), whose sum is σ = 42404447867040. Its totient is φ = 9086578314240.

The previous prime is 21202119999971. The next prime is 21202120000043. The reversal of 21202120000012 is 21000002120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21202119999947 and 21202120000001.

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, 4318314 + ... + 7813582.

It is an arithmetic number, because the mean of its divisors is an integer number (1766851994460).

Almost surely, 2^{21202120000012} is an apocalyptic number.

It is an amenable number.

21202120000012 is an abundant number, since it is smaller than the sum of its proper divisors (21202327867028).

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

21202120000012 is a wasteful number, since it uses less digits than its factorization.

21202120000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711921 (or 3711919 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21202120000012 its reverse (21000002120212), we get a palindrome (42202122120224).

The spelling of 21202120000012 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, twelve", and thus it is an aban number.