21311144134422 has 16 divisors (see below), whose sum is σ = 44092022347440. Its totient is φ = 6858759031712.

The previous prime is 21311144134381. The next prime is 21311144134477. The reversal of 21311144134422 is 22443144111312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61238919753 + ... + 61238920100.

It is an arithmetic number, because the mean of its divisors is an integer number (2755751396715).

Almost surely, 2^{21311144134422} is an apocalyptic number.

21311144134422 is an abundant number, since it is smaller than the sum of its proper divisors (22780878213018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311144134422 is a wasteful number, since it uses less digits than its factorization.

21311144134422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122477839887.

The product of its digits is 18432, while the sum is 33.

Adding to 21311144134422 its reverse (22443144111312), we get a palindrome (43754288245734).

The spelling of 21311144134422 in words is "twenty-one trillion, three hundred eleven billion, one hundred forty-four million, one hundred thirty-four thousand, four hundred twenty-two".