21200010000012 has 24 divisors (see below), whose sum is σ = 54962988889200. Its totient is φ = 7066669999968.

The previous prime is 21200009999999. The next prime is 21200010000017. The reversal of 21200010000012 is 21000001000212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21200009999949 and 21200010000003.

It is not an unprimeable number, because it can be changed into a prime (21200010000017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98148194337 + ... + 98148194552.

It is an arithmetic number, because the mean of its divisors is an integer number (2290124537050).

Almost surely, 2^{21200010000012} is an apocalyptic number.

It is an amenable number.

21200010000012 is an abundant number, since it is smaller than the sum of its proper divisors (33762978889188).

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

21200010000012 is a wasteful number, since it uses less digits than its factorization.

21200010000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196296388902 (or 196296388894 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21200010000012 its reverse (21000001000212), we get a palindrome (42200011000224).

The spelling of 21200010000012 in words is "twenty-one trillion, two hundred billion, ten million, twelve", and thus it is an aban number.