312121011224 has 32 divisors (see below), whose sum is σ = 653276543040. Its totient is φ = 138573808800.

The previous prime is 312121011221. The next prime is 312121011271. The reversal of 312121011224 is 422110121213.

It is a junction number, because it is equal to n+sod(n) for n = 312121011196 and 312121011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121011221) 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, 41238422 + ... + 41245989.

It is an arithmetic number, because the mean of its divisors is an integer number (20414891970).

Almost surely, 2^312121011224 is an apocalyptic number.

It is an amenable number.

312121011224 is an abundant number, since it is smaller than the sum of its proper divisors (341155531816).

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

312121011224 is a wasteful number, since it uses less digits than its factorization.

312121011224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82484471 (or 82484467 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 312121011224 its reverse (422110121213), we get a palindrome (734231132437).

The spelling of 312121011224 in words is "three hundred twelve billion, one hundred twenty-one million, eleven thousand, two hundred twenty-four".