312225251212 has 24 divisors (see below), whose sum is σ = 624463471520. Its totient is φ = 133808042880.

The previous prime is 312225251153. The next prime is 312225251227. The reversal of 312225251212 is 212152522213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830214 + ... + 1993522.

Almost surely, 2^312225251212 is an apocalyptic number.

It is an amenable number.

312225251212 is an abundant number, since it is smaller than the sum of its proper divisors (312238220308).

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

312225251212 is a wasteful number, since it uses less digits than its factorization.

312225251212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231601 (or 231599 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

Adding to 312225251212 its reverse (212152522213), we get a palindrome (524377773425).

The spelling of 312225251212 in words is "three hundred twelve billion, two hundred twenty-five million, two hundred fifty-one thousand, two hundred twelve".