1220312303312 has 20 divisors (see below), whose sum is σ = 2366643943620. Its totient is φ = 609565479168.

The previous prime is 1220312303281. The next prime is 1220312303317. The reversal of 1220312303312 is 2133032130221.

It can be written as a sum of positive squares in 2 ways, for example, as 1186975386256 + 33336917056 = 1089484^2 + 182584^2 .

It is a super-2 number, since 2×1220312303312² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220312303317) 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, 36899987 + ... + 36933042.

It is an arithmetic number, because the mean of its divisors is an integer number (118332197181).

Almost surely, 2^{1220312303312} is an apocalyptic number.

It is an amenable number.

1220312303312 is a deficient number, since it is larger than the sum of its proper divisors (1146331640308).

1220312303312 is a wasteful number, since it uses less digits than its factorization.

1220312303312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73834070 (or 73834064 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1220312303312 its reverse (2133032130221), we get a palindrome (3353344433533).

The spelling of 1220312303312 in words is "one trillion, two hundred twenty billion, three hundred twelve million, three hundred three thousand, three hundred twelve".