312000400313321 has 4 divisors (see below), whose sum is σ = 330353365037652. Its totient is φ = 293647435588992.

The previous prime is 312000400313311. The next prime is 312000400313323. The reversal of 312000400313321 is 123313004000213.

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 123900162792025 + 188100237521296 = 11131045^2 + 13714964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312000400313321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312000400313323) 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, 9176482362140 + ... + 9176482362173.

It is an arithmetic number, because the mean of its divisors is an integer number (82588341259413).

Almost surely, 2^{312000400313321} is an apocalyptic number.

It is an amenable number.

312000400313321 is a deficient number, since it is larger than the sum of its proper divisors (18352964724331).

312000400313321 is a wasteful number, since it uses less digits than its factorization.

312000400313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18352964724330.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 312000400313321 its reverse (123313004000213), we get a palindrome (435313404313534).

The spelling of 312000400313321 in words is "three hundred twelve trillion, four hundred million, three hundred thirteen thousand, three hundred twenty-one".