21211200220012 has 36 divisors (see below), whose sum is σ = 42948297984760. Its totient is φ = 9134009660160.

The previous prime is 21211200219997. The next prime is 21211200220039. The reversal of 21211200220012 is 21002200211212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1153274853 + ... + 1153293244.

Almost surely, 2^{21211200220012} is an apocalyptic number.

21211200220012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21211200220012 is an abundant number, since it is smaller than the sum of its proper divisors (21737097764748).

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

21211200220012 is a wasteful number, since it uses less digits than its factorization.

21211200220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306568142 (or 2306568129 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211200220012 its reverse (21002200211212), we get a palindrome (42213400431224).

The spelling of 21211200220012 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, two hundred twenty thousand, twelve".