20124012400321 has 8 divisors (see below), whose sum is σ = 21308181027624. Its totient is φ = 18939888572160.

The previous prime is 20124012400301. The next prime is 20124012400339. The reversal of 20124012400321 is 12300421042102.

It can be written as a sum of positive squares in 4 ways, for example, as 12374135900721 + 7749876499600 = 3517689^2 + 2783860^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20124012400321 - 2³⁷ = 19986573446849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20124012400292 and 20124012400301.

It is not an unprimeable number, because it can be changed into a prime (20124012400301) 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, 10272750 + ... + 12073831.

It is an arithmetic number, because the mean of its divisors is an integer number (2663522628453).

Almost surely, 2^{20124012400321} is an apocalyptic number.

It is an amenable number.

20124012400321 is a deficient number, since it is larger than the sum of its proper divisors (1184168627303).

20124012400321 is a wasteful number, since it uses less digits than its factorization.

20124012400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22399571.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20124012400321 its reverse (12300421042102), we get a palindrome (32424433442423).

The spelling of 20124012400321 in words is "twenty trillion, one hundred twenty-four billion, twelve million, four hundred thousand, three hundred twenty-one".