1321223012312 has 32 divisors (see below), whose sum is σ = 2867030054400. Its totient is φ = 559070856864.

The previous prime is 1321223012281. The next prime is 1321223012327. The reversal of 1321223012312 is 2132103221231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149320058 + ... + 149328905.

It is an arithmetic number, because the mean of its divisors is an integer number (89594689200).

Almost surely, 2^{1321223012312} is an apocalyptic number.

It is an amenable number.

1321223012312 is an abundant number, since it is smaller than the sum of its proper divisors (1545807042088).

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

1321223012312 is a wasteful number, since it uses less digits than its factorization.

1321223012312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298649055 (or 298649051 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321223012312 its reverse (2132103221231), we get a palindrome (3453326233543).

The spelling of 1321223012312 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-three million, twelve thousand, three hundred twelve".