312000203310221 has 4 divisors (see below), whose sum is σ = 312131240777244. Its totient is φ = 311869165843200.

The previous prime is 312000203310193. The next prime is 312000203310233. The reversal of 312000203310221 is 122013302000213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 116163969087721 + 195836234222500 = 10777939^2 + 13994150^2 .

It is a cyclic number.

It is not a de Polignac number, because 312000203310221 - 2³⁰ = 311999129568397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312000203310193 and 312000203310202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312000203310281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65518729940 + ... + 65518734701.

It is an arithmetic number, because the mean of its divisors is an integer number (78032810194311).

Almost surely, 2^{312000203310221} is an apocalyptic number.

It is an amenable number.

312000203310221 is a deficient number, since it is larger than the sum of its proper divisors (131037467023).

312000203310221 is a wasteful number, since it uses less digits than its factorization.

312000203310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131037467022.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 312000203310221 its reverse (122013302000213), we get a palindrome (434013505310434).

The spelling of 312000203310221 in words is "three hundred twelve trillion, two hundred three million, three hundred ten thousand, two hundred twenty-one".