21112221120002 has 8 divisors (see below), whose sum is σ = 31668559110012. Its totient is φ = 10556034750000.

The previous prime is 21112221119893. The next prime is 21112221120013. The reversal of 21112221120002 is 20002112221112.

It can be written as a sum of positive squares in 2 ways, for example, as 17786116934881 + 3326104185121 = 4217359^2 + 1823761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 37556249 + ... + 38114252.

Almost surely, 2^{21112221120002} is an apocalyptic number.

21112221120002 is a deficient number, since it is larger than the sum of its proper divisors (10556337990010).

21112221120002 is a wasteful number, since it uses less digits than its factorization.

21112221120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75810004.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112221120002 its reverse (20002112221112), we get a palindrome (41114333341114).

The spelling of 21112221120002 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, two".