21211021211122 has 8 divisors (see below), whose sum is σ = 33688092511836. Its totient is φ = 9981657040512.

The previous prime is 21211021211069. The next prime is 21211021211131. The reversal of 21211021211122 is 22111212011212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19517142388041 + 1693878823081 = 4417821^2 + 1301491^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21211021211122.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 311926782483 + ... + 311926782550.

Almost surely, 2^{21211021211122} is an apocalyptic number.

21211021211122 is a deficient number, since it is larger than the sum of its proper divisors (12477071300714).

21211021211122 is a wasteful number, since it uses less digits than its factorization.

21211021211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623853565052.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21211021211122 its reverse (22111212011212), we get a palindrome (43322233222334).

The spelling of 21211021211122 in words is "twenty-one trillion, two hundred eleven billion, twenty-one million, two hundred eleven thousand, one hundred twenty-two".