21142442311320 has 128 divisors (see below), whose sum is σ = 69303107105280. Its totient is φ = 5117317632000.

The previous prime is 21142442311307. The next prime is 21142442311343. The reversal of 21142442311320 is 2311324424112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11858841 + ... + 13524680.

It is an arithmetic number, because the mean of its divisors is an integer number (541430524260).

Almost surely, 2^{21142442311320} is an apocalyptic number.

21142442311320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142442311320 is an abundant number, since it is smaller than the sum of its proper divisors (48160664793960).

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

21142442311320 is a wasteful number, since it uses less digits than its factorization.

21142442311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25384177 (or 25384173 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21142442311320 its reverse (2311324424112), we get a palindrome (23453766735432).

The spelling of 21142442311320 in words is "twenty-one trillion, one hundred forty-two billion, four hundred forty-two million, three hundred eleven thousand, three hundred twenty".