1321021020308 has 36 divisors (see below), whose sum is σ = 2545740087072. Its totient is φ = 594852059280.

The previous prime is 1321021020289. The next prime is 1321021020313. The reversal of 1321021020308 is 8030201201231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807416 + ... + 1814927.

Almost surely, 2^{1321021020308} is an apocalyptic number.

It is an amenable number.

1321021020308 is a deficient number, since it is larger than the sum of its proper divisors (1224719066764).

1321021020308 is a wasteful number, since it uses less digits than its factorization.

1321021020308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622572 (or 2622463 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1321021020308 its reverse (8030201201231), we get a palindrome (9351222221539).

The spelling of 1321021020308 in words is "one trillion, three hundred twenty-one billion, twenty-one million, twenty thousand, three hundred eight".