307812218757121 has 16 divisors (see below), whose sum is σ = 331636468656528. Its totient is φ = 284008907116800.

The previous prime is 307812218757097. The next prime is 307812218757193. The reversal of 307812218757121 is 121757812218703.

It can be written as a sum of positive squares in 8 ways, for example, as 27083031506496 + 280729187250625 = 5204136^2 + 16754975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307812218757121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (307812218752121) 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 15 ways as a sum of consecutive naturals, for example, 287955451 + ... + 289022431.

It is an arithmetic number, because the mean of its divisors is an integer number (20727279291033).

Almost surely, 2^{307812218757121} is an apocalyptic number.

It is an amenable number.

307812218757121 is a deficient number, since it is larger than the sum of its proper divisors (23824249899407).

307812218757121 is a wasteful number, since it uses less digits than its factorization.

307812218757121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076772.

The product of its (nonzero) digits is 2634240, while the sum is 55.

The spelling of 307812218757121 in words is "three hundred seven trillion, eight hundred twelve billion, two hundred eighteen million, seven hundred fifty-seven thousand, one hundred twenty-one".