21220344302212 has 24 divisors (see below), whose sum is σ = 40649831151552. Its totient is φ = 9612690866400.

The previous prime is 21220344302197. The next prime is 21220344302219.

21220344302212 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21220344302219) 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, 822991464 + ... + 823017247.

It is an arithmetic number, because the mean of its divisors is an integer number (1693742964648).

Almost surely, 2^{21220344302212} is an apocalyptic number.

21220344302212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220344302212 is a deficient number, since it is larger than the sum of its proper divisors (19429486849340).

21220344302212 is a wasteful number, since it uses less digits than its factorization.

21220344302212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646009019 (or 1646009017 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

It can be divided in two parts, 2122034 and 4302212, that added together give a palindrome (6424246).

The spelling of 21220344302212 in words is "twenty-one trillion, two hundred twenty billion, three hundred forty-four million, three hundred two thousand, two hundred twelve".