312133122321220 has 48 divisors (see below), whose sum is σ = 668144848029120. Its totient is φ = 122442913064576.

The previous prime is 312133122321217. The next prime is 312133122321221. The reversal of 312133122321220 is 22123221331213.

It is not an unprimeable number, because it can be changed into a prime (312133122321221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63263350 + ... + 68018509.

It is an arithmetic number, because the mean of its divisors is an integer number (13919684333940).

Almost surely, 2^{312133122321220} is an apocalyptic number.

It is an amenable number.

312133122321220 is an abundant number, since it is smaller than the sum of its proper divisors (356011725707900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312133122321220 is a wasteful number, since it uses less digits than its factorization.

312133122321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131284164 (or 131284162 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 312133122321220 its reverse (22123221331213), we get a palindrome (334256343652433).

The spelling of 312133122321220 in words is "three hundred twelve trillion, one hundred thirty-three billion, one hundred twenty-two million, three hundred twenty-one thousand, two hundred twenty".