1222320123412 has 12 divisors (see below), whose sum is σ = 2147935986196. Its totient is φ = 608624127360.

The previous prime is 1222320123403. The next prime is 1222320123413. The reversal of 1222320123412 is 2143210232221.

It can be written as a sum of positive squares in 2 ways, for example, as 1113712966276 + 108607157136 = 1055326^2 + 329556^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222320123413) 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, 633982503 + ... + 633984430.

Almost surely, 2^{1222320123412} is an apocalyptic number.

It is an amenable number.

1222320123412 is a deficient number, since it is larger than the sum of its proper divisors (925615862784).

1222320123412 is a wasteful number, since it uses less digits than its factorization.

1222320123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267967178 (or 1267967176 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1222320123412 its reverse (2143210232221), we get a palindrome (3365530355633).

The spelling of 1222320123412 in words is "one trillion, two hundred twenty-two billion, three hundred twenty million, one hundred twenty-three thousand, four hundred twelve".