21144113241222 has 16 divisors (see below), whose sum is σ = 42290071713072. Its totient is φ = 7047730208640.

The previous prime is 21144113241133. The next prime is 21144113241259. The reversal of 21144113241222 is 22214231144112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21144113241222.

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, 76735623 + ... + 77010674.

It is an arithmetic number, because the mean of its divisors is an integer number (2643129482067).

Almost surely, 2^{21144113241222} is an apocalyptic number.

21144113241222 is an abundant number, since it is smaller than the sum of its proper divisors (21145958471850).

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

21144113241222 is a wasteful number, since it uses less digits than its factorization.

21144113241222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153769223.

The product of its digits is 6144, while the sum is 30.

Adding to 21144113241222 its reverse (22214231144112), we get a palindrome (43358344385334).

The spelling of 21144113241222 in words is "twenty-one trillion, one hundred forty-four billion, one hundred thirteen million, two hundred forty-one thousand, two hundred twenty-two".