1331202021329 has 4 divisors (see below), whose sum is σ = 1343414884020. Its totient is φ = 1318989158640.

The previous prime is 1331202021299. The next prime is 1331202021341. The reversal of 1331202021329 is 9231202021331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 323507275729 + 1007694745600 = 568777^2 + 1003840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331202021329 - 2³⁶ = 1262482544593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331202024329) 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, 6106431182 + ... + 6106431399.

It is an arithmetic number, because the mean of its divisors is an integer number (335853721005).

Almost surely, 2^{1331202021329} is an apocalyptic number.

It is an amenable number.

1331202021329 is a deficient number, since it is larger than the sum of its proper divisors (12212862691).

1331202021329 is a wasteful number, since it uses less digits than its factorization.

1331202021329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12212862690.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 1331202021329 in words is "one trillion, three hundred thirty-one billion, two hundred two million, twenty-one thousand, three hundred twenty-nine".