1331021996 has 6 divisors (see below), whose sum is σ = 2329288500. Its totient is φ = 665510996.

The previous prime is 1331021969. The next prime is 1331022059. The reversal of 1331021996 is 6991201331.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166377746 + ... + 166377753.

It is an arithmetic number, because the mean of its divisors is an integer number (388214750).

Almost surely, 2^1331021996 is an apocalyptic number.

It is an amenable number.

1331021996 is a deficient number, since it is larger than the sum of its proper divisors (998266504).

1331021996 is a wasteful number, since it uses less digits than its factorization.

1331021996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332755503 (or 332755501 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 1331021996 is about 36483.1741491883. The cubic root of 1331021996 is about 1100.0060594708.

The spelling of 1331021996 in words is "one billion, three hundred thirty-one million, twenty-one thousand, nine hundred ninety-six".