21324320144112 has 40 divisors (see below), whose sum is σ = 55136881343104. Its totient is φ = 7101777127104.

The previous prime is 21324320144107. The next prime is 21324320144117. The reversal of 21324320144112 is 21144102342312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21324320144107) and next prime (21324320144117).

It is a self number, because there is not a number n which added to its sum of digits gives 21324320144112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324320144117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197745148 + ... + 197852955.

Almost surely, 2^{21324320144112} is an apocalyptic number.

It is an amenable number.

21324320144112 is an abundant number, since it is smaller than the sum of its proper divisors (33812561198992).

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

21324320144112 is a wasteful number, since it uses less digits than its factorization.

21324320144112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395599237 (or 395599231 counting only the distinct ones).

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

Adding to 21324320144112 its reverse (21144102342312), we get a palindrome (42468422486424).

The spelling of 21324320144112 in words is "twenty-one trillion, three hundred twenty-four billion, three hundred twenty million, one hundred forty-four thousand, one hundred twelve".