312201222402340 has 24 divisors (see below), whose sum is σ = 655629045112440. Its totient is φ = 124879255043328.

The previous prime is 312201222402323. The next prime is 312201222402379. The reversal of 312201222402340 is 43204222102213.

It can be written as a sum of positive squares in 4 ways, for example, as 137950239829284 + 174250982573056 = 11745222^2 + 13200416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312201222402299 and 312201222402308.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 75043755 + ... + 79094674.

It is an arithmetic number, because the mean of its divisors is an integer number (27317876879685).

Almost surely, 2^{312201222402340} is an apocalyptic number.

It is an amenable number.

312201222402340 is an abundant number, since it is smaller than the sum of its proper divisors (343427822710100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312201222402340 is a wasteful number, since it uses less digits than its factorization.

312201222402340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154239711 (or 154239709 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 312201222402340 its reverse (43204222102213), we get a palindrome (355405444504553).

The spelling of 312201222402340 in words is "three hundred twelve trillion, two hundred one billion, two hundred twenty-two million, four hundred two thousand, three hundred forty".