21201222210212 has 12 divisors (see below), whose sum is σ = 40475060583216. Its totient is φ = 9636919186440.

The previous prime is 21201222210209. The next prime is 21201222210281.

21201222210212 is nontrivially palindromic in base 10.

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, 240922979618 + ... + 240922979705.

It is an arithmetic number, because the mean of its divisors is an integer number (3372921715268).

Almost surely, 2^{21201222210212} is an apocalyptic number.

21201222210212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21201222210212 is a deficient number, since it is larger than the sum of its proper divisors (19273838373004).

21201222210212 is a wasteful number, since it uses less digits than its factorization.

21201222210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481845959338 (or 481845959336 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 2120122 and 2210212, that added together give a palindrome (4330334).

The spelling of 21201222210212 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, two hundred ten thousand, two hundred twelve".