21222200120013 has 6 divisors (see below), whose sum is σ = 30654289062254. Its totient is φ = 14148133413336.

The previous prime is 21222200119957. The next prime is 21222200120027. The reversal of 21222200120013 is 31002100222212.

It can be written as a sum of positive squares in only one way, i.e., 17096678544969 + 4125521575044 = 4134813^2 + 2031138^2 .

It is not a de Polignac number, because 21222200120013 - 2⁴² = 16824153608909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222200120213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179011117770 + ... + 1179011117787.

Almost surely, 2^{21222200120013} is an apocalyptic number.

It is an amenable number.

21222200120013 is a deficient number, since it is larger than the sum of its proper divisors (9432088942241).

21222200120013 is a wasteful number, since it uses less digits than its factorization.

21222200120013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358022235563 (or 2358022235560 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222200120013 its reverse (31002100222212), we get a palindrome (52224300342225).

The spelling of 21222200120013 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred million, one hundred twenty thousand, thirteen".