1321307929788 has 48 divisors (see below), whose sum is σ = 3843804889344. Its totient is φ = 343196864640.

The previous prime is 1321307929729. The next prime is 1321307929789. The reversal of 1321307929788 is 8879297031231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321307929789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714992545 + ... + 714994392.

It is an arithmetic number, because the mean of its divisors is an integer number (80079268528).

Almost surely, 2^{1321307929788} is an apocalyptic number.

It is an amenable number.

1321307929788 is an abundant number, since it is smaller than the sum of its proper divisors (2522496959556).

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

1321307929788 is a wasteful number, since it uses less digits than its factorization.

1321307929788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429986962 (or 1429986960 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 1321307929788 in words is "one trillion, three hundred twenty-one billion, three hundred seven million, nine hundred twenty-nine thousand, seven hundred eighty-eight".