313033312121 has 4 divisors (see below), whose sum is σ = 313034509044. Its totient is φ = 313032115200.

The previous prime is 313033312103. The next prime is 313033312127. The reversal of 313033312121 is 121213330313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121213330313 = 881 ⋅137586073.

It can be written as a sum of positive squares in 2 ways, for example, as 294479875600 + 18553436521 = 542660^2 + 136211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313033312121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313033312127) 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, 19400 + ... + 791481.

It is an arithmetic number, because the mean of its divisors is an integer number (78258627261).

Almost surely, 2^313033312121 is an apocalyptic number.

It is an amenable number.

313033312121 is a deficient number, since it is larger than the sum of its proper divisors (1196923).

313033312121 is an equidigital number, since it uses as much as digits as its factorization.

313033312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196922.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 313033312121 its reverse (121213330313), we get a palindrome (434246642434).

The spelling of 313033312121 in words is "three hundred thirteen billion, thirty-three million, three hundred twelve thousand, one hundred twenty-one".