312001203220 has 96 divisors (see below), whose sum is σ = 775057409280. Its totient is φ = 103225328640.

The previous prime is 312001203211. The next prime is 312001203229. The reversal of 312001203220 is 22302100213.

It is an interprime number because it is at equal distance from previous prime (312001203211) and next prime (312001203229).

It is a junction number, because it is equal to n+sod(n) for n = 312001203194 and 312001203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312001203229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7559440 + ... + 7600600.

It is an arithmetic number, because the mean of its divisors is an integer number (8073514680).

Almost surely, 2^312001203220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312001203220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387528704640).

312001203220 is an abundant number, since it is smaller than the sum of its proper divisors (463056206060).

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

312001203220 is a wasteful number, since it uses less digits than its factorization.

312001203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43073 (or 43071 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 312001203220 its reverse (22302100213), we get a palindrome (334303303433).

The spelling of 312001203220 in words is "three hundred twelve billion, one million, two hundred three thousand, two hundred twenty".