313121022002 has 4 divisors (see below), whose sum is σ = 469681533006. Its totient is φ = 156560511000.

The previous prime is 313121021989. The next prime is 313121022077. The reversal of 313121022002 is 200220121313.

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

It can be written as a sum of positive squares in only one way, i.e., 167396357881 + 145724664121 = 409141^2 + 381739^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78280255499 + ... + 78280255502.

Almost surely, 2^313121022002 is an apocalyptic number.

313121022002 is a deficient number, since it is larger than the sum of its proper divisors (156560511004).

313121022002 is a wasteful number, since it uses less digits than its factorization.

313121022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156560511003.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 313121022002 its reverse (200220121313), we get a palindrome (513341143315).

The spelling of 313121022002 in words is "three hundred thirteen billion, one hundred twenty-one million, twenty-two thousand, two".