312233222211220 has 12 divisors (see below), whose sum is σ = 655689766643604. Its totient is φ = 124893288884480.

The previous prime is 312233222211203. The next prime is 312233222211221. The reversal of 312233222211220 is 22112222332213.

It can be written as a sum of positive squares in 2 ways, for example, as 146445915002256 + 165787307208964 = 12101484^2 + 12875842^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312233222211221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7805830555261 + ... + 7805830555300.

It is an arithmetic number, because the mean of its divisors is an integer number (54640813886967).

Almost surely, 2^{312233222211220} is an apocalyptic number.

It is an amenable number.

312233222211220 is an abundant number, since it is smaller than the sum of its proper divisors (343456544432384).

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

312233222211220 is a wasteful number, since it uses less digits than its factorization.

312233222211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15611661110570 (or 15611661110568 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 312233222211220 its reverse (22112222332213), we get a palindrome (334345444543433).

The spelling of 312233222211220 in words is "three hundred twelve trillion, two hundred thirty-three billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty".