12401122321 has 6 divisors (see below), whose sum is σ = 14425795410. Its totient is φ = 10629533376.

The previous prime is 12401122319. The next prime is 12401122339. The reversal of 12401122321 is 12322110421.

It can be written as a sum of positive squares in only one way, i.e., 11355246721 + 1045875600 = 106561^2 + 32340^2 .

It is not a de Polignac number, because 12401122321 - 2¹ = 12401122319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12401122351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126542016 + ... + 126542113.

It is an arithmetic number, because the mean of its divisors is an integer number (2404299235).

Almost surely, 2^12401122321 is an apocalyptic number.

It is an amenable number.

12401122321 is a deficient number, since it is larger than the sum of its proper divisors (2024673089).

12401122321 is an equidigital number, since it uses as much as digits as its factorization.

12401122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253084143 (or 253084136 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12401122321 its reverse (12322110421), we get a palindrome (24723232742).

The spelling of 12401122321 in words is "twelve billion, four hundred one million, one hundred twenty-two thousand, three hundred twenty-one".