4320400012121 has 8 divisors (see below), whose sum is σ = 4322366279784. Its totient is φ = 4318433996800.

The previous prime is 4320400012087. The next prime is 4320400012177. The reversal of 4320400012121 is 1212100040234.

It can be written as a sum of positive squares in 4 ways, for example, as 302319626896 + 4018080385225 = 549836^2 + 2004515^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4320400012121 - 2²² = 4320395817817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4320400012093 and 4320400012102.

It is not an unprimeable number, because it can be changed into a prime (4320400015121) 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, 39801521 + ... + 39909921.

It is an arithmetic number, because the mean of its divisors is an integer number (540295784973).

Almost surely, 2^{4320400012121} is an apocalyptic number.

It is an amenable number.

4320400012121 is a deficient number, since it is larger than the sum of its proper divisors (1966267663).

4320400012121 is a wasteful number, since it uses less digits than its factorization.

4320400012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126171.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 4320400012121 its reverse (1212100040234), we get a palindrome (5532500052355).

The spelling of 4320400012121 in words is "four trillion, three hundred twenty billion, four hundred million, twelve thousand, one hundred twenty-one".