312313120221 has 8 divisors (see below), whose sum is σ = 440912640384. Its totient is φ = 195961173440.

The previous prime is 312313120181. The next prime is 312313120283. The reversal of 312313120221 is 122021313213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312313120221 - 2²¹ = 312311023069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312313122221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3061893285 + ... + 3061893386.

It is an arithmetic number, because the mean of its divisors is an integer number (55114080048).

Almost surely, 2^312313120221 is an apocalyptic number.

It is an amenable number.

312313120221 is a deficient number, since it is larger than the sum of its proper divisors (128599520163).

312313120221 is a wasteful number, since it uses less digits than its factorization.

312313120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6123786691.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312313120221 its reverse (122021313213), we get a palindrome (434334433434).

The spelling of 312313120221 in words is "three hundred twelve billion, three hundred thirteen million, one hundred twenty thousand, two hundred twenty-one".