313121021308 has 6 divisors (see below), whose sum is σ = 547961787296. Its totient is φ = 156560510652.

The previous prime is 313121021299. The next prime is 313121021309. The reversal of 313121021308 is 803120121313.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313121021309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39140127660 + ... + 39140127667.

Almost surely, 2^313121021308 is an apocalyptic number.

It is an amenable number.

313121021308 is a deficient number, since it is larger than the sum of its proper divisors (234840765988).

313121021308 is a wasteful number, since it uses less digits than its factorization.

313121021308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78280255331 (or 78280255329 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 313121021308 in words is "three hundred thirteen billion, one hundred twenty-one million, twenty-one thousand, three hundred eight".