312121223122 has 8 divisors (see below), whose sum is σ = 468234936972. Its totient is φ = 156042910800.

The previous prime is 312121223087. The next prime is 312121223131. The reversal of 312121223122 is 221322121213.

It can be written as a sum of positive squares in 2 ways, for example, as 306505069641 + 5616153481 = 553629^2 + 74941^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 312121223093 and 312121223102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8828329 + ... + 8863612.

Almost surely, 2^312121223122 is an apocalyptic number.

312121223122 is a deficient number, since it is larger than the sum of its proper divisors (156113713850).

312121223122 is a wasteful number, since it uses less digits than its factorization.

312121223122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17700764.

The product of its digits is 576, while the sum is 22.

Adding to 312121223122 its reverse (221322121213), we get a palindrome (533443344335).

The spelling of 312121223122 in words is "three hundred twelve billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty-two".