1331000001 has 24 divisors (see below), whose sum is σ = 1980078464. Its totient is φ = 860919840.

The previous prime is 1330999997. The next prime is 1331000017. The reversal of 1331000001 is 1000001331.

It is a Cunningham number, because it is equal to 1100³+1.

It is not a de Polignac number, because 1331000001 - 2² = 1330999997 is a prime.

It is a super-2 number, since 2×1331000001² = 3543122005324000002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331000051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116766 + ... + 127656.

Almost surely, 2^1331000001 is an apocalyptic number.

It is an amenable number.

1331000001 is a deficient number, since it is larger than the sum of its proper divisors (649078463).

1331000001 is a wasteful number, since it uses less digits than its factorization.

1331000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11301 (or 11298 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 1331000001 is about 36482.8727076145. The cubic root of 1331000001 is about 1100.0000002755. Note that the first 6 decimals are identical.

Adding to 1331000001 its reverse (1000001331), we get a palindrome (2331001332).

The spelling of 1331000001 in words is "one billion, three hundred thirty-one million, one", and thus it is an aban number.