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BaseRepresentation
bin1001000111011000101…
…11110011111000101001
31002221102200021200021002
410203230113303320221
520112420021410441
6355514505524345
731425320132012
oct4435427637051
91087380250232
10313203310121
11110913115649
125084b1a36b5
13236c5376450
14112328b2009
1582318c0b9b
hex48ec5f3e29

313203310121 has 4 divisors (see below), whose sum is σ = 337295872452. Its totient is φ = 289110747792.

The previous prime is 313203310097. The next prime is 313203310127. The reversal of 313203310121 is 121013302313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121013302313 = 929130261897.

It can be written as a sum of positive squares in 2 ways, for example, as 110779802896 + 202423507225 = 332836^2 + 449915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-313203310121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313203310093 and 313203310102.

It is not an unprimeable number, because it can be changed into a prime (313203310127) 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, 12046281146 + ... + 12046281171.

It is an arithmetic number, because the mean of its divisors is an integer number (84323968113).

Almost surely, 2313203310121 is an apocalyptic number.

It is an amenable number.

313203310121 is a deficient number, since it is larger than the sum of its proper divisors (24092562331).

313203310121 is a wasteful number, since it uses less digits than its factorization.

313203310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24092562330.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 313203310121 its reverse (121013302313), we get a palindrome (434216612434).

The spelling of 313203310121 in words is "three hundred thirteen billion, two hundred three million, three hundred ten thousand, one hundred twenty-one".

Divisors: 1 13 24092562317 313203310121