312100432321 has 4 divisors (see below), whose sum is σ = 312283055700. Its totient is φ = 311917808944.

The previous prime is 312100432309. The next prime is 312100432333. The reversal of 312100432321 is 123234001213.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (312100432309) and next prime (312100432333).

It can be written as a sum of positive squares in 2 ways, for example, as 205521689025 + 106578743296 = 453345^2 + 326464^2 .

It is a cyclic number.

It is not a de Polignac number, because 312100432321 - 2¹⁹ = 312099908033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312100432292 and 312100432301.

It is not an unprimeable number, because it can be changed into a prime (312100232321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91309126 + ... + 91312543.

It is an arithmetic number, because the mean of its divisors is an integer number (78070763925).

Almost surely, 2^312100432321 is an apocalyptic number.

It is an amenable number.

312100432321 is a deficient number, since it is larger than the sum of its proper divisors (182623379).

312100432321 is a wasteful number, since it uses less digits than its factorization.

312100432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182623378.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312100432321 its reverse (123234001213), we get a palindrome (435334433534).

The spelling of 312100432321 in words is "three hundred twelve billion, one hundred million, four hundred thirty-two thousand, three hundred twenty-one".