21222200222212 has 24 divisors (see below), whose sum is σ = 40515244936992. Its totient is φ = 9646422403200.

The previous prime is 21222200222159. The next prime is 21222200222213.

21222200222212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (21222200222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16855123 + ... + 18070405.

It is an arithmetic number, because the mean of its divisors is an integer number (1688135205708).

Almost surely, 2^{21222200222212} is an apocalyptic number.

21222200222212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222200222212 is a deficient number, since it is larger than the sum of its proper divisors (19293044714780).

21222200222212 is a wasteful number, since it uses less digits than its factorization.

21222200222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612179 (or 1612177 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Multiplying 21222200222212 by its sum of digits (22), we get a palindrome (466888404888664).

It can be divided in two parts, 21222200 and 222212, that added together give a palindrome (21444412).

The spelling of 21222200222212 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred million, two hundred twenty-two thousand, two hundred twelve".