21233120320000 has 100 divisors (see below), whose sum is σ = 53013993018426. Its totient is φ = 8493248000000.

The previous prime is 21233120319997. The next prime is 21233120320003. The reversal of 21233120320000 is 2302133212.

It is an interprime number because it is at equal distance from previous prime (21233120319997) and next prime (21233120320003).

It can be written as a sum of positive squares in 5 ways, for example, as 482835978496 + 20750284341504 = 694864^2 + 4555248^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a self number, because there is not a number n which added to its sum of digits gives 21233120320000.

It is not an unprimeable number, because it can be changed into a prime (21233120320003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32856751 + ... + 33496750.

Almost surely, 2^{21233120320000} is an apocalyptic number.

21233120320000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233120320000 is an abundant number, since it is smaller than the sum of its proper divisors (31780872698426).

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

21233120320000 is an frugal number, since it uses more digits than its factorization.

21233120320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66353539 (or 66353508 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21233120320000 its reverse (2302133212), we get a palindrome (21235422453212).

The spelling of 21233120320000 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred twenty million, three hundred twenty thousand".