1222312443412 has 6 divisors (see below), whose sum is σ = 2139046775978. Its totient is φ = 611156221704.

The previous prime is 1222312443383. The next prime is 1222312443419. The reversal of 1222312443412 is 2143442132221.

It can be written as a sum of positive squares in only one way, i.e., 1196844752016 + 25467691396 = 1094004^2 + 159586^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222312443419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152789055423 + ... + 152789055430.

Almost surely, 2^{1222312443412} is an apocalyptic number.

It is an amenable number.

1222312443412 is a deficient number, since it is larger than the sum of its proper divisors (916734332566).

1222312443412 is a wasteful number, since it uses less digits than its factorization.

1222312443412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305578110857 (or 305578110855 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

Adding to 1222312443412 its reverse (2143442132221), we get a palindrome (3365754575633).

The spelling of 1222312443412 in words is "one trillion, two hundred twenty-two billion, three hundred twelve million, four hundred forty-three thousand, four hundred twelve".